panzafio

lisamhos, Sorry to hear about the problems that you are having. I was having this loud whiring sound for a while from the back of the car. It sounded like the tranny was stuck in high gear. After scouring the two MB forums, I changed tranny fluid and differential fluid and didnot help. I broke down and took it to the dealer and they quoted me over a 1000 bucks to just replace two motor and one tranny mount and that would not fix the problem entirely. So I took my car back went online and purchased for 300 bucks and replaced myself two motor mounts one tranny mount and a the drive shaft support/bearing.These needed to replaced anyway because that contributed to the problem. so then I was lucky to find an independent MB mechanic that figured out that it was the rear differential. He found and replaced it with a used differential for $800 parts and labor and now all is well. no more whiring sound. Now I am trying to figure out why my suspension creaks when I go over bumps. any ideas?

panzafio

I also forgot. I had that whiring sound in the engine once before. what it was is the tensioner pully. it was like a 30 dollar part and took less that 20mins to remove/replace the serpentine belt and the pulley tensioner. Hope this helps.

lisamhos

I took it to the MB Dealership. It was my alternator. They wanted $1300 to replace. What a JOKE. I bought one for $200 and my 16 year old son replaced it in about 2 hours. Even if they DOUBLED the price of the part ($400) and charged $99/hr for labor, that job should have been $600 or less.
Now, my rear sun shade is out and they quoted me $2600. Will never go back to the dealer.
Thanks for the input!

SunnyRayToronto

If you need more motivation to fix your rear sun shade,.... do this!

Then go to you local Mercedes-Benz stealership,... and show them your working rear sun shade!

Cynthia Redpath

Do you still have the sound clips to what was wrong with your car?