I have over the last 6 months replaced left and right rear struts and ABC pump. The car have been through the rodeo and the system have been bleeded several times. The last action was about a month ago when the pump was replaced. All done by MB.

For a couple days ago I noticed that my left front drops about 3/4 inch over the night. I have checked, there are absolutly no leaks, and the oil level is ok.

The car do not raise when I start the car, but when I put the car into R or D and release the brake the car first go down and then up at the left side. Both front and rear left side goes down and up.

What causes this? The ABC system was checked out ok when the car was at the dealership replacing the pump. No leaks, no errorcodes, everything was ok.

 

Been in contact with the dealership today. They told me that they allowed the car to drop 2 inches before they classified it as an error.

If the car drops more, and the "car to low" message comes up, they will flush the system. If that doesn't help replacing the valve block is the next step.

 

I had a similar problem w/ my '03 SL500. The LF would drop overnight about 2". The rest would drop only about 3/4". My very competent independant replaced the front valve block. Wallah! Now all four drop an acceptable 3/4".

 

This is a matter of consistent service. My '03 SL55 has had zero problems. I think that flushing the system every 3-4 years helps avert challenges like this.

Press them harder. They need to take care of you.

 

I will talk to them again tomorrow. My top suddenly wont close, so I have to go there tomorrow anyway.

 

Star gives error code 1525-064. I guess that means that there's a leak in the valve as I expected.

 

Hm, the car do not drop anymore. Maybe there was some air in the system after changing the ABC pump.