crazeazn

I dropped of the car last week at MB Greenway to take care of these sounds on a CPO CL. There are two distinct sounds:

1) low pitch buzzing/electronic interference sound when you change the air conditioner fan speeds from high to low. However, this noise also goes on even IF while the a/c is NOT on. This noise is easily replicated by doing the above.

2) medium pitch blow/whistle coming from the driver's side?

In these videos, its sound #2

https://dl.dropbox.com/u/7954660/17.43.40.mp4

https://dl.dropbox.com/u/7954660/17.44.15.mp4

I just got the car back but I'm still hearing both noises.

Techs word:

"1) High pitched noise at low speeds or idling is the abc pump pulsation dampner noisey. Replaced the dampner and covered by ext warranty
2) Buzzy, interference noise from ac is a normal characteristic of the stepper motor of the AC system. Verified in comparable vehicle"

Its incredibly LOUD when I'm at a stoplight. I've never any of these sounds on my C or even my E. It doesn't feel like they fixed anything. Help anybody? I'm going to yell at them next week.

I'm going to crosspost this in the S class forum as the CL forum doesnt get much love.

crazeazn

to add insult to injury greenway forgot my centercap on one of my wheels from a wheel balance.