Question about 1994 Mercedes-Benz C-Class

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My 1994 Mercedes c220's fuel gauge stopped working

My 1994 Mercedes c220's (4 cylinder gas engine) fuel gauge stopped working and at the same time the check engine light came on. Is this an expensive repair?

Also and seperately, my a/c does not blow cold air and hasn't for a while. Where is the recharge valve located and is it easy to recharge it?

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Fuel level sensor is in the gas tank, may be faulty or just dirty, make sure to fill the tank entirely full with premium unleaded, ad a high quality fuel system cleaner / de-gunker, this may clean the sensor enough to feed back to the gauge. It could also be the fuel gauge itself, but that is less likely. Mercedes will be happier with at least 1/4 tank of fuel at all times, and don't skimp on low octane gas!
As for the check engine light, you may have a bad gas cap... believe it or not a gas cap that doesn't seal properly will throw the check engine light. If you get the codes read (for free) at an Autozone or similar parts store it will likely read "evap system" as the problem, which will likely end up being the gas cap.
Take your car to a service center that does a true "flush and fill" of your a/c system. Those little canisters will just waste your money, and they never truly clean and re-lubricate the system like a flush and fill will do.

Posted on Aug 13, 2010

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Posted on Jan 02, 2017

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