myc43amg

At any speed and sometimes when I'n on idle I get this really annoying "whistle" or "beeeeep" which SEEMS to be coming from the radio but it's not. Here's what I have done so far to try to trouble shoot it.

1- Took off the fuse from radio, still did it.
2- Took of fuse from cigarette lighter, still did it.


It's like it has a bad ground or something.

ALSO, today I got a CHECK ENGINE light. Went to autozone and they hooked up the code reader. But when they asked me to start the car ther was no longer a check engine light. But the guy said it did throw out 2 codes.

1- KNOCK SENSOR - P0330 (I STILL NEED TO DO A SEARCH ON THE CODES)
2- ENGINE COOLING SENSOR - P0115

Could any of these 2 be causing the whistle/beeeep noise?
Also, where's the knock sensor located at?

Hope you guys can help.

Thanks.

Eurosport

it's at the top front of the engine by the belts,
go club202.com i think there's write ups or just do a search on there lots of diy stuff

KJI3jflarryfe93

Hey bud,
I have some whining in my car that sounds electrical.
It sounds like a whisle, this I noticed after me and my friend put the after market illuminated doorsills on my c43.
I then noticed some whistle sound inside my cabin when driving at various speeds.
Once I noticed this sound and I turned off my tapedeck on the On/Off button and the whistle sound just shut off when I pressed the button, after that no whistle sound. Other times I notice this noise randomly, I think it's an alternator problem causing this noise.

Once I thought I busted my rear axle, the pinion bearings got fuuked or something. This causes a similar sound.
Cheers bud