W126, BENZ AID - COMMON QUESTIONS AND ANSWERS

Water in fuel will not start

I have a '76 300d and i got fuel with water in it out of an old container that was supposed to be sealed. I made it about 200 yards before it died. I have changed both fuel filters taken all fuel lines off and blew them out and turned the engine over until clean fuel was squirting out of the injector pump and i even took the injector nozzles apart and cleaned them to make sure there was no water stopping them up. I have also put new glow plugs in it. It will still not start it will try to hit a time or two when u first try to start it and then no more it just turns over.

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4-matic question

recently purchased a 91 300te 4-matic, and need info on status of 4-matic operation. at start up, lights for 4-matic do not come on, nor do they when car is operating. other dash check lights do come on, though not all. the manual "4-matic funktion" switch in the engine compartment is on the "1" position, so i assume it is engaged. How do i know if it is working? how do i know if the dash light for the 4-matic function is burned out, or non-operational?

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Chassis Model Number

W124

A/C Comes on and off periodically

I have an 81 240D and when I turn on the A/C the compressor will kick in and it will blow really cold for a while only when the the analog dial is in the max-a/c position. However periodically it will kick on and off with no real reason behind it. I don't think it's the switch b/c moving it up and down does not fix the problem. It seems as though some part of the system decides its had enough and stops for a while. Anyone have a problem like this? Thanks.

Chassis Model Number

W123

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Body and Interior Specific Aid

Diesel ign. switch problems

I have never really understood, on our 123's, why I have to return the key all the way counter-clockwise if the engine fails to start. Strange voodoo with the vacuum shut-off? A peculiarly odd tuetonic accomodation for the hearing-impaired? What prevents it from functioning. Every now and then I have trouble with the switch stopping before the crank position, no matter what I do. Is this something that popping the cylinder and spraying WD40 would help? It is so intermittent that I could go for weeks without it happening again, or I could get stuck at the drive-up tomorrow. Thoughts?

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Chassis Model Number

W123

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