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Maybe you guys can help me out........

2002/c240

When I start my car and take off in the morning, I get this weird hum and a very slight vibration when I turn the wheel to back out ...and for the first few (15 mins or so) minutes of driving. The sound eventually goes away, but it concerns me. Also, sometimes while the car is still "cold" in the first 15 mins of driving, I heard the hum kick up when I accelerate at a green light.

I have a service appt for Wednesday 6/22, but I'd like to have some background knowledge on what it might be- the car will be warm when I get there and I know they will not be able to replicate it.......

Have any of you heard of this or experienced this?

Thanks in advance for the help and input!!!!
 

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Really it could be anything. Without actually hearing the noise myself it would be impossible to do anything but offer wild guesses. I would make sure you stress that this is a cold start issue and have them let the car sit overnight so they can duplicate your symptoms.
 
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