Strange buzzing from behind dash

DJ Hafez

My uncle has a 01 C-Class Merc and recently there has been a strange buzzing from somewhere behind the dash/under the bonnet. It only happens when you are going at about 25mph+ and dissapears when the steering wheel is turned to the left.As you accelerate, the pitch of the buzz also goes up. He has asked a few mechanics but they don't seem to have a clue. Anyone have any idea?

peasant

Could be everthing and anything mechanical or electrical.
Another suspect would be something caught/stuck/loose somewhere that vibrates in the airflow as you drive.

mike65

Clueless Mercedes mechanics, Shurley not?

If it dissapears when turning left and pitch increases with speed then its proberly something linked to the wheel hub/bearing area. So its not behind the dash. It could be something as obvious as a slight rubbing contact. Does the car have dust sheilds behind the brake calipers, could be the ABS wire or brake wear sensor wire rubbing?

Mike.

templetonpeck

DJ Hafez wrote:

My uncle has a 01 C-Class Merc and recently there has been a strange buzzing from somewhere behind the dash/under the bonnet. It only happens when you are going at about 25mph+ and dissapears when the steering wheel is turned to the left.As you accelerate, the pitch of the buzz also goes up. He has asked a few mechanics but they don't seem to have a clue. Anyone have any idea?

There could be a leaf (or perhaps bee in your case ) stuck in it. Happened to me before (though not with a Merc) and I was sooo embarrassed to realise it was a flippin leaf

DJ Hafez

Well he has taken apart alot of random pieces to look for it and nothing. Ill say about te brake wire seonsor/abs wire though. Not sure if he would have checked that.

More suggestions appreciated

woodseb

DJ Hafez wrote:

More suggestions appreciated

sounds like he has a bee in his bonnet;)

templetonpeck

woodseb wrote:

sounds like he has a bee in his bonnet;)

You should be banned for that :rolleyes: