W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

This beautiful 1982 300 SD has been making a knocking/banging sound that I think is coming from under the valve cover. The noise is not audible at low RPM or before the engine warms up completely. At higer RPM 1700+ the noise becomes increasingly loud and is directly rythmic with the speed of the engine. After probing the noise with a stick I think it may be from what I think is the oil pump (under the oil filter, or the transmission. The trans was probed at the bell housing also close to the oil pump (I think.) Is there anything that could make a loud noise such as this in these areas?

82 300 SD I'm getting a vibration (rear)? shortly after I have reached 35 MPH. I had this problem before I put new tires on it also. Is it possibly from one or both of the short shafts? Vibration does not go away when you put it into nuetral. HELP this is really annoying :)

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.

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?