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$32.50

602 603 Diesel Engine Coolant Thermostat w/ INSTRUCTIONS

Fits models listed below with these engines ONLY from 1986 to 1995

New thermostat 80 degree C with gasket. Comes with illustrated installation tips. Instructions are specific for early 603 engine 1986 and 1987 but will apply to other models as well (some specific details may not apply to the later models).

Fits the following models:

$14.95

Engine Coolant Temperature Sensor

SINGLE pin - located on left side of cylinder head by glow plugs on 1977 to 1985 OM616 and OM617 Diesel engines.

New coolant temperature sensor for most Mercedes built from 1973 to 1993, Gasoline and Diesel models. Many gas models it is located on top of the thermostat housing. Sends signal to engine coolant temperature gauge on the dashboard. These are getting harder to get. Single pin

$96.50

1977 to 1985 Diesel Engine Critical Coolant Service Kit

So often neglected - yet critical to preventing pre-mature or catastrophic engine failure!

Why is this so important? It is primarily due to the age of these cars now and the fact that lurking problems can be hidden from visual inspection. There is not ONE diesel that Kent has looked at in the last five years that does not need this service! Even ones with under 150,000 original miles.

Radiator / Tank Cap 120 degrees
$18.50

R107 W123 W126 Coolant Reservoir Tank Cap 120 degrees

Fits those chassis models from 1981 to 1991 that have a coolant reservoir tank ( see details below )

Replace your old worn and weak expansion tank cap to eliminate minor coolant loss problems. Watch the video below as Kent will explain the difference in caps and why you want to make sure you purchase the correct one. 

On Demand Video
$18.99

Setting Up Mercedessource Coolant System Pressure Tester Cap - On Demand Video

Video instruction that comes free with the purchase of your custom radiator pressure testing cap and hardware

In this video, Kent will walk you through the steps needed to convert your older Brake Bleeder tank to one that can continue to bleed brake systems as well as pressure test radiators and cooling systems.

$12.90

W201 W124 Coolant Reservoir Pressure Cap

Losing small amounts of coolant? This may be the problem.

This fits all 201 chassis 190E and 190D from 1984 to 1993 and all 124 chassis sedans, coupes and wagons from 1986 to 1995 both gas and diesel. Visually check the condition of the seal on the underside of the cap.

$18.75

Special Radiator Cap Only for Older Models with Cap on Radiator

Fits most models from 1973 to 1983 with cap neck located on the top of the radiator.

If you are experiencing minor coolant loss on your older model that has the cap on the radiator, it may because you do not have the correct cap. Not all caps are created equal as Kent will point out in the video below:

This is the type of radiator that will require this cap.

$62.50

V8 116, Turbo 123, Early 126 Radiator Expansion Tank w/ Plug Preinstalled

Coolant reservoir tank replacement for 450SE 450SEL 300SD 300DT 300CDT and 300TDT 380SE/L to 1984

WILL NOT FIT 85 CALIFORNIA MODELS!! It will fit some 1985 Federal Models only. Original early style overflow coolant tanks are no longer available. For these early models mentioned above, you must purchase the later model tank.

On Demand Video
$4.99

M103 M104 Straight 6 Gas Engine Thermostat Replacement - On Demand Video

A major cause of poor fuel economy and weak cabin heater performance

Many owners neglect replacing the engine coolant thermostat. It just slowly wears out over time. If you notice your engine temperature running low or you car taking a long time to heat up inside these are the first signs your thermostat has failed. 

$34.95

Cooling System Leak Detection Radiator Cap Conversion for Brake Bleeder Tank

UPDATE: 6/25/25. NEW design. Does not require adjustment. Allows you to use our brake bleeder tank to also pressure test the cooling system on most models 1973 to 1995 ( see design of metal cap to confirm )

Have you ever had a hard time finally a very small coolant leak? Do you find yourself adding small amounts of coolant but can not see any leak? Is there a funny smell coming from inside your Benz when you run the heater?

$29.85

123 126 Chassis 617 Turbo Diesel Radiator Hose Kit

With extras as shown. Don't just look at your hosed to determine if they are good. Remove and inspect the ends!

New set of upper and lower radiator hoses that fit 1981 to 1985 300SD, 1981 to 1985 300TD, and 1982 to 1985 300D and CD (turbo engines only). NOTE: Does fit SOME late-model 240D.

We include a chaffing guard for the lower hose.

$112.50

OM617 Turbo 5-Cylinder Diesel Head Gasket Set

SPECIAL ORDER ITEM -- EXPECT DELAYS IN SHIPPING -- for turbo 300D 300CD 300TD and 300SD

New head gasket set. Fits all 5 cylinder TURBO diesel engines only from 1978 to 1985 including 300D, 300CD, 300TD and 300SD. Comes complete with all gaskets only as shown in the picture. Valve stem seals, chain tensioner gasket, thermostat housing gasket, and valve cover gasket are NOT included.

On Demand Video
Temperature Gauge Fix - On Demand Video
$6.99

Faulty Engine Temperature Gauge Troubleshooting and Repair - On Demand Video

Learn from this challenge some basic automotive electrical troubleshooting procedures

If your engine temperature gauge is not reading at all, you need to fix it before you keep driving the car. To ignore this could lead to major engine failure, since you will have no way to get an adequate warning that your engine is about to overheat.

201 124 Chassis Radiator Expansion Tank
$48.00

201 124 Chassis Radiator Expansion Tank

Brand new expansion tank fits all 201 chassis 190D and 190E 1984 to 1993 and 124 chassis 260E, 300E, 300CE and 300TE 1986 to 1992 only. 

Be sure to add a new radiator cap!! Look below to order.

$19.75

OM616 OM617 Thermostat Leak Prevention Install Kit

For 4 and 5 cylinder Diesel engines 1977 to 1985 except 190D

When replacing the thermostat in your order diesel you may end up fitting a lot of corrosion. This kit will help you make sure you do not have any leaks when you install the new thermostat and will prevent corrosion of the housing bolts in the future.

$79.80

1986 to 1991 420 560 V8 Engine Water Pump

High Quality Graf Brand with cast iron impeller for 420 SEL 560SEL 560SEC and 560SL

New water pump and gasket as shown. Plan to change the short hose and thermostat at the same time. Inspect v-belts and change if cracked.

$44.00

1970 to 1975 D-Jetronic V8 Front Engine Short Hose (s) Replacement DIY Kit

You get the hoses, the clamps, the gasket, the sealants and extensive video instructions that will keep out of trouble

If you think your coolant hoses are "ok" they just may be, but it is what is hidden that could be a problem. When you remove those old hoses ( unless they have been replaced in the past 10 years) you may be shocked at what you find.

On Demand Video
Removing the Cylinder Head to Diagnosis an Overheating Diesel - On Demand Video
$10.99

Part 2: Diesel Buyer Beware - Cylinder Head Gasket Failure and Removal Woes - On Demand Video

Is it really only "just a head gasket?" Kent will remove a cylinder head to illustrate the myth.

When an engine is both overheating and losing coolant, you first want to exhaust all possibilities that the cause is something simple or inexpensive to repair. It is possible it might just be a stuck thermostat with a faulty water pump leaking coolant at the same time.

$23.75

Fluid Maintenance - Radiator and Fuel Hose HD Pinch off Pliers

A must when changing rear mount fuel filters and pumps. Best tool for secure clamp-off in tight locations. Works on fuel hose, coolant hose and even big radiator hose.

I have used a lot of different clamping tools over the years to prevent fluids from leaking out when removing coolant, fuel, or brake fluid hoses. Most work ok. Some are hard to use in tight places.  Many do not stop every last drip from coming out of the hose.

$12.75

Late W123 Bosch Electric Auxiliary Water Pump BYPASS Kit

If the electric pump is not working and you don't want to replace it. GET IT OUT of your system!

Since the original style Bosch electric water pumps are no longer available NEW. If you need a replacement pump, you have three options. 1. Buy a used pump. 2. Buy our newer pump conversion upgrade. 3. Take your inoperable pump out of the system.

Sale
$115.00

1981 to 1991 Monovalve Climate Control Electric Water Pump Upgrade

Revised 3/9/26 Auxiliary pump replacement for 1981 to 1985 W123, 1982 to 1989 R107 and 1981 to 1991 W126 with ACCIII automatic climate control.

Since the original old style Bosch electric pumps are no longer available, Kent decided to come up with a good alternative. He went to work to adapt the newer style pump found on most Mercedes of the 1990s.

Diesel Engine Short Hose Kit
$31.95

240D 300D 300SD Diesel Engine Short Hose Kit

SPECIAL HOSE DISCONTINUED -- LIMITED KITS AVAILABLE AS OF APRIL 2026

Fits 116 123 and 126 chassis diesel engines from 1977 to 1985. This includes the 240D, 300D, 300TD and 300D/300SD turbo engines.

This is the "hidden" radiator hose that never gets replaced!

On Demand Video
$12.99

60x Diesel Engine Fuel Warmer Bypass Instructions - On Demand Video

For 1984 to 1995 OM601 OM602 and OM603 engines in W201, W124, W126 and W140 Chassis

Mercedes installed small fuel warmers on these engines using engine coolant to warm up the fuel just before it enters the injection pump. The idea is great - especially in cold climates, but in moderate and warmer climates it is probably not needed.

On Demand Video
Mercedes Monovalve Installation - On Demand Video
$9.99

Monovalve Heater Control Inspection - Installation - Testing - On Demand Video Manual

Covers 1981 to 1991 W123 W107 and W126 with automatic climate control panel

If you have a 1981 to 1985 W123 300D, 300CD, 280E, 280CE, 300TD or a 1981 to 1989 W107 380SL, 560SL, or a 1981 to 1991 W126 380SE/L 300SD 500SE/L 300SDL 420SE/L 300SE/L 560SE/L 380SEC 560SEC that has automatic climate control this video manual will apply. These c

Sale
$18.25

Radiator and Heater Hose Pick Removal Tool SET

Use all all vehicles to "unstick" old rubber coolant hoses. These have the best angles!

If you plan to change coolant hoses this is a must-have labor-saving tool. These are cleverly designed tools. I could not have done it better myself. I actually use to make a couple of different types before I found this set.

$19.70

M272 M278 OEM Oil Filter Housing to Oil Cooler Gasket

If you don't change this as a preventative measure, you risk mixing coolant and engine oil together!

Of course, you want to change this if you find oil leaking out the bottom onto your drive belt, but it can also leak internally, allowing coolant to get into your engine oil or vice versa. 272273

On Demand Video
$12.99

1970 to 1975 D-Jetronic V8 Front Engine Short Hose Replacement - On Demand Video

These are the two short coolant hoses in front that hardly ever get changed. What you find when you pull them will surprise you!

In this 23 minute highly detailed video Kent will show you to reasons why and some of the problems you will run into when you change these hoses on your own D-Jet engine. He will take the new parts and show you how to properly install them using the correct hose clamps, sealants and lubes. 

$92.50
Currently out of stock.

W107 W126 Chassis 380 V8 Engine Thermostat and Short Hose Replacement Kit

For 380SL, 380SLC, 380SE, 380SEL and 380SEC. When replacing an old thermostat always replace the short hose that it is attached to!

Brand new thermostat, heavy-duty short hose, and 2 new clamps. Fits all 126 Chassis 380 engines from 1981 to 1985 both in 107 chassis and 126 Chassis. Free Video installation tips included ( click on the arrow in the center of the picture to watch below:

$18.75

R107 380SL 3 Easy Fix Fluid Leaks DIY Kit

Inexpensive DIY kit that helps you fix some annoying fluid leaks in just a few minutes.

These are three inexpensive parts that seem to never get replaced when they wear out. If "mechanics" miss these items. Are you losing coolant? Are you losing windshield washer fluid? Do you have unsightly oil on your right valve cover?

$89.00
Currently out of stock.

380SL Flexible Fuel Hose from Filter to Main Engine Fuel Hard Line

NO LONGER AVAILABLE

Fits all 380SL and 380SLC from 1981 to 1985. This flexible fuel hose connects the outlet of the fuel filter to the metal hard fuel line going from the rear of the 380SL to the engine compartment. This hose is hard to install and hard to inspect.

$18.75

Turbo Diesel Cylinder Head Bolt Removal Tool - 12M Star Bit (Triple Square)

1978 to 1985 5 Cylinder Turbo Diesel Engines 300D 300TD 300CD 300SD

If you have worked on 5-cylinder 617 turbo diesel cylinder heads before you already know how important it is to have the correct socket for the "triple square" cylinder head bolts. This socket is a must to properly remove and re-torque those bolts.

Diesel Thermostat Installation Kit
$46.50

115 116 123 126 Diesel Thermostat Installation Kit

Fits 115 116 123 and 126 chassis diesel engines, non turbo and turbo, to 1985. This includes the 220D, 240D, 300D 300TD wagon and 300D/300SD turbo engines. Most thermostats only last a few years and should be changed for optimal diesel performance.

$69.75

Pressure Brake Bleeder

*Note: this pressure tank can now perform a cooling system pressure leak test as well . Kent's 2-in-1 invention. See below to purchase the pressure testing cap.

When used for bleeding or flushing your brake system, a single person can do a rapid fluid flush!  No mess and very efficient. Will work on all Mercedes from 1968 to 1995 - Also select 1960's models and most later chassis up to 2006 see list below: 25-minute video instructions are now included.

$65.00

2007 to 2012 GL450 GL550 Power Steering Filter and Fluid Change Kit

For only those models with the M273 V8 engine. This is a highly neglected service!

This DIY job is very important for a number of reasons. Changing the fluid and the filter every 40k to 50k will extend the life of your power steering pump and steering rack. Changing out the reservoir will allow you to replace the seal between the tank and the pump.

$97.50

2007 to 2012 GL450 GL550 V8 Front Engine Pesky Leaks Fix Kit

100K Service: Solve THREE common engine fluid leaks while servicing your power steering fluid and filter at the same time.

Watch the YouTube video below for full details. Kent will tell you everything about this kit and why you should do this joy yourself around 100,000 miles

This kit includes the following:

$28.95

1977 to 1985 Diesel Pump Fuel "Leak-Back" Protection

For quicker starts overnight or after long storage. 240D 300D 300TD 300CD and 300SD

If you find your old diesel slow to start after it has been parked overnight or for extended periods, the problem could be a loss of fuel in the injection pump.  Let's face it.

$358.00

1972 to 1975 R107 350SL 450SL SLC Complete Fuel Pump Conversion Kit

This FID kit offers a replacement Bosch fuel pump with correct fuel pressure, new filter, new hoses, clamps, and video instructions. Will also work on the 1973-75 D-Jetronic 450SE and 450SEL (see notes below)

Since new original style pumps are no longer made, this is the best way to finally fix your old fuel pump leaks and poor performance.

$315.95
Currently out of stock.

1981 to 1985 380SL R107 Fuel Delivery Overhaul Kit with Free Video Instructions

NO LONGER AVAILABLE. See deluxe kit listed below updated 8/27/25

All 380SL, 380SE, and 380SEL owners take note. Even if you acquire a nice 380 like Kent's Cherry you are going to need some or all of these components ( unless of course it was recently done by a competent mechanic ).

$419.00

6 Cylinder M103 M104 CIS Fuel Delivery FID Overhaul Kit

For 1988 to 1993 M103 and M104 CIS powered cars (W201, W124, R129 and W126 chassis)

Most 1988 to 1993 6 cylinder CIS fuel injection delivery (FID) systems are old and tired and have not been properly maintained. These include the W201 190E 2.6, the W124 260E 300E, 300CE, 300TE, the W126 300SE, and 300SEL, and the R129 300SL.

$549.50

1986 to 1991 R107 and W126 V8 Twin Pump Fuel Delivery Overhaul Kit

For 420SEL, 560SEL, 560SEC and 560SL - Complete Kit with detailed video DIY instructions

DOES NOT INCLUDE ANY METAL FACTORY HARD LINES!!! What you SEE in the picture is exactly what you will receive. Many of these particular big V8 models are now becoming true collector cars and going up in value at a steady rate.

$2.95

617 Turbo Diesel Transmission Bowden Cable O-ring Seal

For 1981 to 1985 Turbo Diesel 300D 300TD 300CD and 300SD

Custom ordered for a better fit than original! special Oring seal for the bowden cable housing where it connects to the right side of the automatic transmission. This is a common leak area and you may be fooled into thinking it is leaking out of the pan gasket.

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