Have Mercedes Questions? Ask a Mechanic for Answers ASAP
Hello, my name is Bobby. Thanks for the question. Can you tell me if the check engine light is coming on? Did this happen all of a sudden or was it gradual?
Thank you. Most of the time on this engine this is due to a malfunctioning throttle body or a failing mass air flow sensor. Both of these are common. Since the check engine light is on you need to start by having the computer scanned for codes. Most auto parts stores will do this for free. If you have this done bring them to me and I can tell you with more certainty what is going on.
Did these codes come up prior to replacing these parts? Did you clean the throttle body also?
You need to clean the throttle body at the engine. This is where the air enters the engine and has the throttle plate in it.