Question about 2004 Mercedes-Benz C-Class
Mercedes ML500 washer tank was leaking, removed it and found that the second pump (for rear washer/wiper) was actually what was leaking through its housing. Disconnected and removed it and temporarily plugged hole. Now the tank holds fluid again and "low fluid" light on dash is out, but front windshield washer doesn't work. I put a meter on the connector to that pump and read no voltage when "wash" lever is activated. Only thing I can think of is that this car is smart enough to detect the open circuit on the disconnected second pump and shut the whole system down. Could this be true?
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Posted on Jan 02, 2017
If this MB is built like others I have known, this is going to be a chore.
Some models required the removal of the dashboard to replacement the wiper motor.
I recall hearing from a frustrated owner (former brother-in-law) that the dealer-estimated labor time was 5 hours.
I wanted to refer you to Chilton or Haynes for an aftermarket manual but surprisingly, neither of them offer one covering your 1990 year.
Posted on Jan 29, 2009
hello,have you check your wiper relay located on top of main fuse box,maybe poor contact,or your combination switch for wiper have worn-out mechanism,or your wiper motor need tobe check the condition,ty
Posted on May 03, 2009
When you pull the lever to activate the windshield washers, do you hear any type of sound coming from under the hood? A whirring sound should be heard from the little electric pump that feds the washers.
If you can hear the whir, then you should look for a possible clog in the washer hoses (there is more than one...).
If you cannot hear the whirr, then you should check the fuse that protects the windshield washer circuit. Check your owner's manual for the location and correct amperage for this circuit.
Posted on Jun 16, 2009
Car has rain sensing windshield.Most likely you have the wiper on/off level in the intermittent position,which turns on the sensor. When the sensor detects moisture or even dust sometimes. It turns on wipers. Just make sure the wipers are off and not in the intermittent position.
Posted on Jun 17, 2009
It sounds like you have what is known as a short to power. I would suggest having an automotive electrician/technician take a look at the electrical wiring and your switches. I believe it may be inside your turn signal switch. It sure sounds like many issues Ive seen over the years and the switch was the culprit. Good luck.
Posted on Aug 24, 2009
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