clk 320 "chirping" - PeachParts Mercedes-Benz Forum

richard28 · #1 10-23-2007, 11:49 AM

I'm trying to figure out where this sound is coming from. Chirping, just like a bird, occurs during driving, over bumps, over smooth surfaces and even can be heard when I close the front doors on both sides of the car. Thought it might be the serpentine belt, but it seems tight and in good shape. Recently replaced front & rear shocks, rear springs (left one cracked) and ball joints; tie rods are leaking & will be replaced next week. Thanks for your thoughts.

Ethan · #2 10-23-2007, 12:02 PM

can you hear the noise with the car stationary? and with the HVAC (a/c heater) off ?

richard28 · #3 10-23-2007, 12:17 PM

Yes, sometimes the noise can be heard when the car is stationary, motor running & hvac off.

Ethan · #4 10-23-2007, 12:58 PM

it could be anything from a damaged engine mount to bearing on an alternator.

one thing, do a search on this forum for accessory belt tensioner or BELT TENSIONER.

If you have a stethoscope and are extremely careful you can listen to alternator, belt tensoner, water pump.

When you mention closing the front doors and hearing it I think windshield mounting or door straps even hood latch or inside rear view mirror.

Hopefully I mentioned some items you can eliminate.

Lots of times a helper who can listen to the car from the outside as you drive by can clue you in.

joseph c · #5 10-23-2007, 11:32 PM

dump water on the belts while running and see if the noise stops, if so it is belt noise

richard28 · #6 10-29-2007, 05:30 PM

My indie heard the noise last weekend and said I need the emergency brake repair kit (12442008720). Shouldn't this be checked when rear rotors are replaced, or could something have gotten loose when he replaced those rear rotors?