appear on the screen "stop, car is too low." loading bumper with air. but does not keep air. what the problem may be the first bumper.

 

Your airmatic shocks are probably gone.

 

Probably your shocks like T-Mac said. Happened to me with the same fault displaying. Hopefully your pump didn't kill itself keep trying to pump air (mine did). Check this website if you are out of warranty.
http://www.arnottindustries.com

 

Do NOT use Arnott Industries. They sent me a faulty strut out of the box that had a "lifetime warranty with satisfaction guaranteed." If it wasn't for the good relationship I had with my SA, I'd have been out $300 in labor charges because the dealer installed the strut only to find out it was useless from the beginning.

It took over a month for me to get my money back. To top it off, my dealer had sent my core to them, which they did refund, but then wouldn't give me shipping charges back for their useless part. Basically spent $40 for them to take my strut (while I got NOTHING from them) so they could rebuild and sell it. It wasn't until I yelled at them for about the 12th time that I was finally made whole again. It was the mere principal of the situation. I would have rather had my core back to be honest just so they wouldn't have been able to make any money off my part. The attitude I got from them over the whole situation made it even worse. They said this was "standard" practice and expected to be treated the same way even they were in my situation. Yeah right.

I have a thread about my situation somewhere. I will have a post that follows up the whole situation soon. But do NOT do business with that company.

EDIT: Here's the thread: https://mbworld.org/forums/e-class-w...ml#post4730284. There is a link in there that you can source a new MB part for $825, which is less than the $1,100 new. I told Arnott I'd rather buy that then give them another dime of my money.