Proper diagnosis is priority one - then repair! DIY testing and repair kits available.
What's wrong with my Mercedes?
You CAN do this yourself if you have the right information and equipment!
Some leaks are not difficult to fix. Others require removal of the transmission
You might be surprised at just how many problems and failures could be avoided with periodic and proper lubrication
Be careful to not let someone sell you a rebuilt transmission!
New bushings will solve the problem and possibly prevent disaster
Yes, you are fortunate there is an adjustment!
Both problems require removal and it can be a little "tricky"
Watch the video and Kent will explain his recommendations.
Be Kind to Your Transmission Pan Gasket!
Find the actual source of the leak before jumping to conclusions
This can leave you stranded if not caught early enough
Minor frustration for most of us who service our own transmissions
A medium frustration for most of us who service our own transmissions
Get a good light and get under the car.
A major frustration for most of us who service our own transmissions
If you could just figure out what is wrong you know you could fix it!
Care must be exercised to prevent damage or premature failure
How to improve performance and prolong the life of a tired gas or diesel automatic transmission
There is a proper way to do this to determine proper level inside transmission
The transmission will bind or won't shift if worn bushings are out of adjustment
Often caused by loose fittings and engine vibration
Don't just ignore your turbo charger or major problems can occur!
Top problems for diesel owners. Kent recommends starting with the basics
Injectors do not last forever. Changing over to Monark nozzles can boost performance!
Yes, Kent has seen it first hand. Don't neglect this!
Could be any number of things causing the problem. Proper diagnosis is a must!
Failure of these hoses can lead to total destruction of your engine
It is almost always a failed thermostat
Timing tends to retard over time with wear and chain stretch
Most of those annoying leaks can be fixed with our DIY kits
Diesel Purge can help you isolate the noise
This can help smooth out a rough shakey idle on an 5 cylinder turbo diesel
Good reference material if you plan to replace timing chain and related parts.
Do it very soon unless you know it have been done within the last 50,000 miles.
Before spending any money on a tired or ailing diesel engine - check the compression first
Don't neglect the fuel filter and fuel pump check valves
Many are surprised to learn there is a filter down inside the pump
A special compound should be used - especially with steel bolts in aluminum threads
Alert for all Diesel Owners - Check for loose Intake / Exhaust Manifold Nuts.
This MUST be installed properly when replacing it or timing chain or engine damage can occur!
Applies to 220D 240D 300D 300CD 300TD 300SD 1972 to 1985
Failure of these chains can lead to catastrophic engine failure
This is often neglected and an easy D.I.Y. job
Usually means something is broken or loose in the engine compartment
They can be a little tricky to isolate
Alert! Use at your own risk
This can be a real challenge if the problem comes and goes either warm or hot
4 key performance related issues to consider. Do proper troubleshooting first BEFORE buying parts
An ounce of preventation is worth hundreds of dollars in repair
Don't just install the engine without taking care of a number of potential problems
On some models this can be a difficult and frustrating job
Check Your Low Pressure Power Steering Pump Hose
This is Kent's favorite
It will require the removal of the serpentine belt
How to get the frozen nuts off and the stud back in safely
If you don't fix it the problem will get worse and the coolant hose will leak
A real problem when changing an engine or the rubber mounts
This can be a sign that the engine has not been well maintained
They can fall off especially if your exhaust system is sagging or not mounted properly
Fuel injectors will need the most attention
Summary list of the most common causes and parts needed to fix them Part 2 of 5
How to determine if they need replacement
Find out what it does, how to test it, and what happens if it does not work.
You may have to make your own like Kent did...:-)
Quite a number of changes for just a one year and final run of the 300D 300CD 300TD 300SD
How can you do it without removing them from the engine?
This is normally not due to "leaking seals" inside the turbo charger
With the right paint and technique YOU can do it yourself!
Summary list of the most common causes and parts needed to fix them
It is best if you can see and hear it run - if not some tests are essential
Here are some quick checks you can do yourself to determine how good the engine is.
Most often this can be done without special tools using a helper and a heavy hammer
You can do it with magnets!
Sometimes it can be near impossible to get the bolts out and the parts separated
Summary list of the most common causes and parts needed to fix them Part 3 of 5
Kent has been inspired to design his own series of ultimate shop lights
When you engine wears out - look seriously at swapping in a different engine
Some special tools can help
Parts are different so it is important to know which engine you have!
If you don't look closely this one can be hard to find!
Summary list of the most common causes and parts needed to fix them. Part 5 of 5
You neglect the maintenance here and you WILL pay the price
Be sure to check your radiator / expansion tank cap
These can be hard to see if your engine is dirty and you don't know the exact location
Summary list of the most common causes and parts needed to fix them Part 4 of 5
It is not the problem with the new nozzle - there are other issues that cause poor spray
Sometimes they are really stuck on the shaft!
If the break was clean and the tank still solid you can be repair it for less than $50.
Fan clutch can make metallic clinking noises
Sometimes you just have to take a break from working on your diesel... :-)
Are you concerned about damage to the electrical components and sensitive electronics?
You of course need the right wrenches - but if one or more won't adjust - what then???
Monitor your engine temperature gauge in the morning for telltale signs.
Now the timing marks don't line up - What do I do! - Help...
This can be difficult to diagnose
These can be a little tricky to get on
Biodiesel is not too kind to rubber
Too Cold think thermostat - too Hot think a number of possible causes
The best way is to use an oil extractor
With the right instructions this is a beginner DIY job.
It could be turbo seals but it could also be excessive diesel engine blow-by
There is a better and cleaner way!
Pay attention! This is very common and can happen to you if you own a 1968 to 1985 diesel
Tired of waiting for the glow plugs to heat up - we have the answer!
Here are some of Kent's favorites - most you should carry in your trunk
How to tell which one you have?
6 part video series on reasons why you should or shouldn't
Even low mileage gas Mercedes as Kent recently discovered.
This is how Kent deals with the problem
Adjustment procedure must be followed properly!!!
It could be a number of things causing the problem. Follow Kent's video series
Applies to most models from 1980 to 1995
Could be the starter itself, ring gear on the flywheel or a combination of both
Sometimes fuel injector cleaner can work wonders
Best done from the front crankshaft bolt
An old hose can be very difficult to remove due to age and corrossion
Your inspection should always include this
A faulty 617 turbo diesel waste gate can really affect engine performance
At all costs avoid rounding out the hex head of the bolt!
Some are no longer available new and the last ones will disappear soon
With the right tool and a little know-how it is super easy.
You MUST make sure this is working and adjusted properly if you want your diesel to GO !!!!
It takes work but with the right products and techniques you will be amazed
If not too far gone you can fix them - and yes it is a miracle!
Not easy by any means. Options and ways to prevent it are listed here.
If you use RTV you can create some real problems
You actually may not need a large tank to thoroughly clean them
Listen and learn from a live video with sound.
Do not neglect to give it Kents 30 day exercise program
Avoid the pain of having to drill or cut the bolts off
Ball joints and pivot points should be lubricated on a 6 to 12 month basis
Common problem due the failed air cleaner mounts and mounting bracket
A very common problem that requires MORE than just installing a new rubber gasket
You would be amazed at the pesky problems these can create!
We have a special kit with complete instructions so you can fix it yourself.
If the engine has been overheated it is almost never "just a head gasket"
Body and Exterior Trim Problems
It can be restored but it takes a special power tool and hard work
Nothing like a good smooth working power or manually operated non tilting sunroof (up to 1985)!
Be careful or you could end up losing big time
Regular cleaning and lubrication is the key to long life
If is seems too good to be true - then in this case it is true!
They are ugly when deteriorated - beautiful when replaced properly!
This is not expensive if you find used parts and do the work yourself!
With the right tools and parts you can fix this nagging problem yourself
Kent shares three of his favorites
Easy to round out the hex head bolts - then what do you do ?? !!!
If caught early enough they can be easily fix permanently with Miracle Paint
This can sometimes be a real challenge if you do not know where to look
You are not alone! What can you do to replace those rusty or missing metal clamps
Be sure to look UNDER the trunk seal - you might be surprised!
There is one amazing product Kent recently found that polishes it all!
It could be coming from a number of places for a number of reasons
Stop it BEFORE bubbles in the paint and holes start to appear!
The best way to save money is to buy the right car in the first place
This one has just the right combination of benefits
It is simple to clean out the hole and adjust it with the right "tool."
Both are repairable by the DIY mechanic with the right knowledge and supplies.
Fix it before it leads to major failure! Exhaust muffler found dead on road...
Anyone want to guess what the secret is???
Failure is almost always caused by corrosion due to high moisture environment and lack of lubrication
Kent believes there is no one correct answer. Just too many options...lol
It is a little tricky and very easy to damage it.
There is a way to do it without damaging anything on many older models
Most in this list are avoided due to cost - Fix them yourself with our kits and save hundreds $$$.
Ignore it and you will be sorry! Can you remove and service it yourself?
Until you have driven one it is hard to explain
It could be that you installed in upside down
Tough job and you will need heat! Also applies to 107, 114, 115, and 116 chassis
The right tool can do the job without damage
Start with something you can do yourself that is not super difficult and gives dramatic results.
When using contact cement you have one shot to get it right! Kent's video will show you how to prevent mistakes.
You can do this in your own driveway with minimal tools and experience
My sunroof motor does not run or it runs but the cable does not move
Kent recently discovered one product that shines above all the rest
Tired of seeing little gaps show up?
On 1973 to 1985 models this has to be done with care to prevent damage
In most cases it is a two step process - especially if your paint is faded.
Easily lost or rusted out - hard to find replacements
Knowing what to look for will help you decide if replacement is needed
Put the body filler on in two phases and manage the time when you grate and sand it
W124 Chassis procedure shown here but applies to many models
Location of the three digit numerical code and translation here
2 Primary reasons these hood hinge assemblies fail
Just take a break!
This applies to the W123 240TD, 300TD and 280TE and the W124 300TD, 300TE, and E320TE.
Most common when car has sat outside for long periods without use
You don't have to use expensive spray equipment or 2 part expensive primer
Depending on where the damage is you can do amazing things with jacks and hammers.
Nothing is better than a good thick fender cover
Failure to do preventative maintenance could lead to some very expensive repairs
Steps to diagnose and repair it before it becomes a MAJOR problem. Steps to fix it after it does!
There are ways to reduce it - and we have ways to fix it!
D.I.Y. reinforcement kit available for 116, 123 and 126 chassis front seats
Using the right methods and products are the key to the amazing results
The key is in using the right products and techniques. Let Kent show you how.
Here is a temporary fix until you get get the replacement parts
Can be frustrating and a little mysterious if you have not done it before
Can be problematic without using the correct tools and techniques
Improper technique can break the mirror glass or permanently damage the ball socket
There is a simple fix to keep those old sun visors up
Very common problem - easy fix once you remove the door panel
Procedure very similar from mid 1970's to mid 1990's
How to get the regulator out the door when this happens
Very common problem on most 1970's and early to mid 1980's W123 and W126
You can fix it yourself with our simple kit
Yes, for W107, W123. W126, W201 and W124 from 2phast Motorsports
This is something you can easily fix yourself
Broken, sagging, painful, tilting front seat bottoms ruin the driving experience!
Removing it, replacing it, lubricating it, replacing the glass with out breaking it - you can do it!
Cleaning and proper lubrication can add years to your key tumbler and save you hundreds $$$
Sure sign of a common problem - leak in oil pressure gauge actuator
When all else fails check the wiring
This can drive you crazy. Never assume anything. The leak may be coming from a place you would least expect
Tired of holding it up or down in a turn - Kent has a simple fix
If you don’t see the head of the bolt then you have to …
Care must be exercised to prevent damage to the steering lock mechanism
Hardest part is removing that weird round slotted nut on the lower hinges!
Indoor lighting can be difficult. Kent has recently found the ultimate solution.
Shake, side pull, binding, grabbing, grinding, squealing, overheating and soft / hard pedal issues.
Fixing brakes is not difficult and can save you hundreds
Efficient and affordable pressure bleeding, system flush and fluid capture is here for all.
Causes and cures for this common problem
There are some signs that will let you know your calipers are locking up.
If you are losing brake fluid the source must be found quickly
Must be done anytime you replace front brake rotors
After looking for years Kent has finally come up with the ideal no-spill fluid extractor
A good soft fender cover is the BEST solution!
If over 15 years old then this is a must do job to prevent braking problems!
Don't be too hasty to buy a new one
Some simple precautions can save a big mess and ease brake system bleeding
This is not to be taken lightly!
Can the problem really be solved? Kent has been on the hunt for a solution.
Clutch and brake fluid can be unkind to your cylinders and pistons
Fuel Delivery Problems
You will need a bench mount pressure release tester to do this yourself.
The sources of fuel leaks and procedures needed to repair them are many
Major cause of sudden loss of power
A plugged filter inside your fuel tank can lead to hard starting and power loss
A unique special tool so affordable every diesel owner should have one
Begin with the "back end" fuel delivery system first.
If you know your glow plugs are working properly it could be a fuel pressure issue
Very important for cars over 20 years old.
More common than you think and easy to fix with right tools
Here are some ways to inspect for and prevent algae growth
Try to do this without spilling fuel on your car and all over the ground!
Fuel Line and Transmission Cooler Line Leak Prevention
This can be a frustrating challenge without the right tools.
These are signs your turbo over boost protection system is not working properly
You need to look no further than the precision nozzles produced by Monark of Germany
Fix at first sign of wetness under car - BEFORE total failure
How to make your own in a pinch
Already done filters, injectors, tuning and still want more power - there is one more thing you could do.
You will be amazed how well this works!
Here are some things you should look out for!
This important device is not immune to problems as the older diesel engines age!
Most owners forget about the fuel injectors - Cap, rotor, wires and plugs may not be enough
Sometimes it can be something quite simple - other times not...
Some will need to be "back flushed"
This one you definitely do not want to ignore!
The fuel from the injection pump can be shut off by following this tip:
You have to be sure all air is removed from the fuel lines and hoses
Applies to all 200D 220D 240D 300D 300CD 300TD 300SD 190D 300SDL 350SD and 350SDL
Learn how this works so well and how you can do it yourself
How do you know if they are bad? If they have not been recently rebuilt they probably are!!!
Must read info BEFORE you rebuild your injector nozzles
With the right tools and procedure you can get precise results yourself
Lack of attention here will leave you stranded on the road!
Depends a lot on the climate and how the car was stored but you should always begin with new fuel and filters
Here is an option to replace the pre-glow factory unit with a reliable manual controlled relay
One of the most common problems we see on older Mercedes.
Unknown battery drain, electrical shorts, blown fuses - these can be difficult to isolate!
Installing H4 headlight upgrades will make a difference between night and day
Yes, they do need service if you want them to last.
Some chargers won't start the charge cycle without some help
We are getting too many emails like this usually after parts are bought somewhere else
Burned out glow plugs, bad pre glow relay, blown fuse, wiring - all need to be tested
Do proper testing BEFORE ordering parts or removing door panel
Do proper testing BEFORE ordering parts or removing door panel
We share with you the factory instructions for most models from the late 1970's to late 1980's
If it is happening on a regular basis it probably is not bad glow plugs
Neglect is probably the No. 1 Cause of your Benz not starting
Tired of it taking sooooo long to heat up your glow plugs
It just may not be wired properly. Most likely it is NOT the antenna.
There is a quick fix as well as a more permanent repair
If you are constantly having to replace glow plugs do not immediately blame the plugs! Ream the carbon!
Isolate the source of the short to finally solve your problem
This is a sure sign your electrical switch is going bad
This is one of Kent’s favorite tools to have around the shop
Not as easy as it looks and easy to break if you don't know the proper tricks
If the wiring plug falls apart on you, you won't know what coded wires go where!!!
It is possible to do this but you have to cut the black cap off first.
Talk about a Chinese jig saw puzzle. Kent can show you the trick
You can do it with commercial products or something in the cupboard
You will need a wire schematic to figure out which wires go into which holes
Kent will show you some quick checks to test operation
Corrosion on the contacts can cause all kinds of electrical problems
You have a couple options to keep the battery alive!
Can it really be all that difficult?
Do not assume it is just a bad battery! Diagnose first...
Don't let anyone kid you... this is not an easy job!
Knowing what fuse does what is a must when troubleshooting electrical problems
This could be caused by one or even a combination of three things.
Originals are hard to fix and not available new - Universal new antenna may be best option
Parts breakdown will help you find what you need fast
Inspect the tie rod ends first for wear
If you have a Mercedes station wagon and want to use it to haul loads best to fix it right
Tips on how to make the gloves last longer!
The odometer can lie. Don't be fooled and make an expensive mistake!
This can be frustrating without the right tool. Yes, there is a tool!
It is possible to test their condition on the car
On most models 1973 to 1991 trailing arms can collapse leading to dangerous consequences
123 and 126 Chassis Owner's Alert
Sometimes you can only do it with our special tool - a few occasions you have to drop the rear of the tranny
Not as hard or expensive as you might think. And yes, you can do it yourself!
Alert! Check yours before experiencing a dangerous suspension failure
This happens often enough you need to know the options available for repair
It could be a number of things including shock absorbers
Suspect front wheel bearings
It may take a special tool
Failure to replace the donuts could leave your exhaust dragging on the ground!
This is what Kent uses and you can build it yourself!
Rust / Corrosion Problems
Yes there is! Miracle Paint and fiberglass cloth can work miracles.
You can do it yourself without the hassle and bad side affects of welding!
Not always the best solution as you will see here.
Sometimes You Just Need to Go Have Some Fun!
It works on any type of rust - on any iron based metal - on any vehicle or part
Do NOT neglect inspecting and repairing this area or you will be sorry!
Failure to do this can lead to big problems on these models
It is all about prevention. Remember rust never sleeps!
Easy preventative maintenance you should do at least every six months... unless you live in the desert..:-)
You have to keep the air away from it
When troubleshooting your vacuum system you must know where the hoses and lines go
A very common problem that requires precise troubleshooting
Pump mechanisms breaking apart and piston bolt failures
Common concern on 1980 to 1985 Mercedes Diesel 240D, 300D, 300CD, 300TD
#1 Failure Point are the rubber diaphragms in the door lock actuators
Easy to test when out of car. See Kent's manual to learn how to test without removing door panel.
Double check for damage and use a product to scare them away
Look for the cause in the drive mechanism
Driveline and rear end Problems
The Differentials are very rugged. It is the associated parts that usually fail due to age and high mileage
Start with inspection and replace at first signs of wear to prevent expensive damage to transmission
Sign of worn part when driving over rough ground
If the axle joints are still good new boots are sometimes a good solution
Kent recommends just sending it out for professional repair
Knowing your rear suspension design and theory will help troubleshoot a problem
Nothing like having the right tool
Best way to test them is out of the car on the bench
Climate Control Problems
No heat or heat all the time are common problems with 1977 to 1980 models with automatic controls
A common problem on all models. Options for repairing it yourself and saving big $$$.
Applies to late 123 and 107 chassis and all 126 chassis 1981 to 1991
These really get neglected and they are easy DIY
This applies to the 1977 to 1985 240D 300D 300CD 300TD 280E and 280CE.
SVO / Biodiesel Problems
We offer an easy to install kit or you can build one from our components
Questions and answers to help you decide if this is right for your diesel
The pros, cons, effort, and expense of running your Mercedes Diesel on waste vegetable oil
Here are some tips to considering when putting together your own conversion
Mercedes diesel engines are the only ones well suited for one tank operations
List of possible causes and remedies for hard starting and loss of power
Tail lights we are talking all models from 1960s to Mid 1990's - Fog lights only on those with removable lenses.
If your dash is not lighting up at night it could be a number of problems
Sometimes the fix can be real simple and real cheap.
Knowing what bulbs you need and how to get to them is the key!
Getting to those little bulbs can be challenging.
If your car has the old style sealed beam headlights there is a great solution!
Here are some tips to help you brighten those instrument cluster lights