BenzoDoc

Hello everyone.

I've had a nagging issue, and was hoping to gain some insight from the forum.

In short, whenever the air conditioning is on, there is this annoying chirping/whining from the AC when I accelerate under partial throttle [2k-3k RPM is the worst].

I have recorded a video that captures the sound relatively well.


I searched the forum and found "noisy dash" [https://mbworld.org/forums/w212-amg/...isy-dash.html] and noisy / clunking MCT for the 7 speed, but nothing specific to the air conditioning. This sound does not occur when the air conditioning is off.

Thanks!

Andriy242

Personally sounds like the passenger ac blower motor.
Not surprising for it to go.

I had it go in my C300 and my E63 now.
THey are a quick, cheap and easy fix.

BenzoDoc

Thanks, ill take a look.

maxusa

Blower motor in the passenger footwell is a near certainty. Bearings need lube or blower replacement. Very easy to swap out, p/n A2128200708, $244.