Question about Mercedes-Benz 300-Class

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Mercedes E300D 1995

I, the air conditonning and the rpm does't work ? I change all the fuses....nothing...something when I am going fast evething comes up. Also, certain time when I drive on a bomp ...

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  • hcciv003 Jun 26, 2008

    btw, when i took some comments from internet and used new ..6745 ovp, didn't work. went to the dealer, found out right ovp, replaced, and still works fine now.



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Check your relays. Mercedes Benz has a complex set of relays usually located in the engine compartment. These relays share functionality, i.e. 1 relay controls a set of electronics. could be AC & speedo gauges, etc... If you drive a W124, its behind the battery, if W220, its in the upper left hand size of the bay seperated from the rest of the compartment covered with a black plastic cover with screws.

Posted on Oct 19, 2009

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I got the same problem. replaced ovp and works.

Posted on Jun 26, 2008

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Your rpm is a crank sensor either out of adjustment or you need one,located at crankshaft pulley,your aircon what do you mean not working

Posted on Jun 18, 2008

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