Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi, welcome to Just Answer. My name is***** fault codes can be caused by an intake leak at the manifold. It would have to be at an area that would affect both sides of the motor. The most likely area would be at the throttle body where the air flow meter connects. The best way to find vacuum leaks is with a smoke tester. If you don't have a smoke tester available you can use carb spray to spray around the elbow where it connects to the throttle body and the air flow meter. Another thing to check is the fitment of the air cleaner to the air flow meter. If the air cleaner is not fitted properly it can cause the fault codes. Ideally you should look at the fuel trim values to see if the computer is compensating for an overly lean or an overly rich fuel mixture. A defective air flow meter would not be unusual either. Also, if the fuel adaption values were not reset when replacing the air flow meter the codes may return until the computer readapts.
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Hi! I used carb cleaner around vac hoses. Replace ruber gaskets around elbow under maf sensor the were hard as a rock!
Do you recommend I get a some test done?
If you are still getting the fault codes I'd suggest the smoke test to locate any vacuum leaks that you may have missed. A fuel pressure test should also be performed. If the codes have been erased and have not returned you may have repaired the problem.
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