BENZ AID - COMMON QUESTIONS AND ANSWERS

Transmission vacuum shifting valve keeps dying

I've got a 81 300D. The transmission vacuum shifting valve went bad & it started shifting hard & going back & forth between gears. I replaced it with a good valve off my 'spare parts' car. The transmission started shifting like perfect again. However, after maybe a month the car is shifting hard again. I suspect something on the car is killing this valve.

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Body and Interior Specific Aid

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Questions and Answers

Chassis Model Number

W123

84 300SD slightly rough idle with minor smoke from exhaust

Hey there. Quickly I have an 84 300SD. It is in VERY good condition, everything works (kinda scarry) AC,cruise,acutmatic climate control, I mean it is in really excelelnt shape all the way around. 139k miles and I bought it a few months back. I have done your diesel purge, paid a very reputable shop to do a vavle adjustment and they replaced a vacuum pot that was causing a little shifting gremlin. Anyway all is fine except that a new glitch has occured. I started the car the other day and the idle was a bit rough. Nothing earth ratteling but I also noticed that there is a little smoke coming form the exhaust and ther used to be quite literally none that you could see.

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Diesel Engine Specific Aid

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Questions and Answers

Chassis Model Number

W126

Subframe mounts 1988-560SL

Just received the subframe mount replacement kit. As I am doing a pre-job review of the instructions and looking under the car with front wheels removed - I am concerned with the transmission cooling lines attached to the radiator. Should I detach these lines prior to lowering the subframe??? Looks like they may get hung up if I don't. Has anyone experienced this when doing this job? (The transmission lines are not mentioned in the instruction book) I am looking forward to doing this job myself and hope to get all my ducks in a row prior turning the wrenches.

Chassis Model Number

R107

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Body and Interior Specific Aid

78 300D lost power on highway and stalled, now wont start

I was recently driving down the highway when my 300D seemed to be starving for fuel. It had the usual symptoms, sudden loss of power, no engine response when I hit the gas. So I coasted over to the side of the road and as soon as I stopped, the engine shut off. Now my car won't start. I replaced both fuel filters a week before and have since replaced the glow plugs and still to no avail. I have checked the voltage at each plug and all 5 have power, the engine is getting fuel (although I don't know if it's getting enough) but it just cranks and won't fire.

Chassis Model Number

W123

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Diesel Engine Specific Aid

1985 300TD hood hinge replacement

my hood hinges on 85 300 td wagon got all bent...on one side the hole in the engine compartment that the hinge connects to rusted out...can i just change one side...trying to do this and having a hard time replacing the 13 mm bolt that goes through the hinge into the body of the car can't get a socket wrench in there and can't get enough pressure putting the bolt into the hole to get the threads started...am i making any sense? any recommendations??? thanks for reading...

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

Fixing up 78 240D - where do I start?

Hey everyone, So this is my story and I'll try to keep it as brief as possible. I recently bought a 78 240d though an auction on ebay, pretty much sight unseen. This is my first mercedes, let alone a diesel. The car is pretty solid for what I gave for it, hardly any real serious rust,body is actully real straight, and besides a couple of small items everything seems to work.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

DIY Fuel Injector replacement questions

Hi- first posting here ;) How risky is it to install new fuel injectors yourself? I just got the DIY fuel injector kit from this web site (that I trust) and was going to try and install it myself. Before I did, I asked my mechanic, whom I trust, how much it would cost for HIM to install them. Before we even go to the price he informed me that when you replace the injectors, you sometimes have to resand or buff the inner faces of the fuel injector housing thingy (forget what is is exactly - but those things you disassemble and have spring in them to hold the actual little injectors.)

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

72 220d stc

i have a 72 220d want to put stc,your ready to install stc is mostly for 123,you state 115 chassis is difficult because of battery.can one put filter-vfm on passenger side of engine bay and route longer hose to ip pump etc with insulation on hose.is that the major stumbling block? do you recommend specific insulation on hose? also does veg oil remaining in engine at shutdown cause coking with cold start in the morning?

Chassis Model Number

W115

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SVO Fuel Conversion Specific Aid

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