W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

87 300SDL suddenly won't upshift from 1st

Hey- I am new so please forgive any faux pas-After fueling up, suddenly would not upshift, but if moved to neutral after reaching shift point or higher rpm would slip into higher gears upon shifting back into D- your manuals on this subject seem to only cover diesels up to 1985- can you direct me to appropriate manual/technique/parts/etc I am guessing vacuum trouble but know nothing more on subject- thus I would also like a primer on the vacuum system in general-Thanks!

Chassis Model Number

W126

Forums

Transmission / Suspension Specific Aid

'82 300D stumbles to start - UPDATE, PROBLEM SOLVED!

my '82 300D stumbles when starting in hot or cold weather. i replaced the glow plugs and reamed the pre-chambers. they had minimal carbon build-up. i checked engine (1 degree stretch) and IP timing (24 degress BTDC) and they are both ok. compression is 24+ bar across all cylinders with 96k original miles on the clock. injector release pressure is low (1750 psi) and i plan to replace the nozzles and bump the pop pressures to 1950 psi. could the low pop pressures be the root cause for the stumble starts, or is there something else i need to check?

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

86 300sdl oily gunk in crossover and intake

I am putting in my new balanced injectors and injection pump stub shaft o-rings. I took off the crossover pipe to gain access to the third injector and just give me more room to put hard lines back in after cleaning them off course. I found that there is an oily gunk in the cross over pipe and the intake should I be worried about my turbo? I do have a small oil leak from the turbo (the only oil leak on the car) are the doughnuts bad turbo getting bad ect. Should I take the intake off and clean it and get a new intake gasket soon?

Chassis Model Number

W126

Forums

Diesel Engine Specific Aid

1985 300D Turbo noise whining

Kent, thanks a lot for all the manuals and advice you've handed out. We now have 3 300d's that run well and were broken or barely ran when we bought them.
Now to the annoying stuff...there's a noise my '85 300d is
making. It wines, especially before it's warmed up all the way, when I'm
going less than about 45mph and loudest at around 35mph sustained speed. It
also will go away entirely if I stomp on the gas and when the car shifts
and the rpm's change which makes me think it has something to do with the

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

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