W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

300SD with 420SEL Final Drive question

Kent,

I replaced the rear axle assembly, axles and final drive, of my 1983 300SD with one from a 1991 420SEL. I really like the result with one exception: the speedometer is off (something was wrong when I started passing everybody on the highway at 55 mph). I read somewhere that the problem would be fixed if I repalce the speedometer with one from a 420SEL. Does that make sense? The 420 has a speed sensor in the final drive, the 300SD gets it speed information apparently from somewhere else. Any suggestions would be appreciated.

Thank you
Dieter

Chassis Model Number

W126

Forums

Transmission / Suspension Specific Aid

Injector crush washer centers missing? 300TD '85

A couple of months ago I replaced my injectors with new crush washers. Now, after a compression test & valve adjustment the centers of two of the washers were missing (and one was broken, about to fall out!) The injectors were torqued with a true torque wrench to the right amount. Where did those centers go? Did they simply disintegrate like happened in my '78 diesel VW or are they destroying my engine? Unfortunately I also have a new noise at certain RPMs and when shutting down.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1987 300SDL Power Seats not moving back and forth

When I operate the seat switches on the doors(driver's and passenger's), only the seat backs will fold forward or backwards. The seat bottoms will not move forward or backwards, but the seat bottoms will move up and down. My 5foot tall wife cannot drive our Mercedes since it is set to my 6 foot height! Benz-aid help needed! Thank you.

Chassis Model Number

W126

Forums

Body and Interior Specific Aid

616 617 Diesel exhuast manifold nuts

I recently replaced my exhaust manifold on my 617.951 diesel and couldn't find new copper locking nuts anywhere so I reused the old ones with red thread lock. It's been about five months since then and I noticed a little oil around the front of the gasket, I checked the front nut that I can get to and it was loose enough that I could turn it with my fingers.
My question is, where can I find new locking nuts and what is correct torque for these nuts? My Chilton manual said 18-21 ft lbs but that doesn't seem very tight. Thanks for your help

Chassis Model Number

W116

Forums

Diesel Engine Specific Aid

1982 300 cd Crank Pulley Failure Sheared Bolts

Lost power steering and thought that the belt had simply broken. Instead found that the belt had come off. In any event started the car again to a most annoying racket. Upon looking at the crank pulley assembly noticed that it was awry. Figured I would start by removing the belts and ordered a new set and the belt replacement sourcelet.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

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