Leaks in the pneumatic system will cause problems with the dynamic seats and the trunk and/or door closing assist.
Car Problem Reports
Mercedes-Benz SL55 AMG Pneumatic System Leaks May Cause Problems With Seats, Trunk, and Doors
Mercedes-Benz SL55 AMG Problem
Average Mileage: 35,559 mi (21,000 mi - 61,379 mi)
Visitor, 2004 Mercedes-Benz SL55 AMG, 33,858 mi
I also have this problem. Trunk wont open only manual. Seats dont work and door asist does not work. What needs to be done to fix?
changed pneumatic pump
Visitor, 2004 Mercedes-Benz SL55 AMG, 26,000 mi
I had problem with red light came on with trunk would not close, this was fixed----4 months later red light came on with battery on left side dash and right side said vist for repair. I have a new battery istalled year ago also
Visitor, 2004 Mercedes-Benz SL55 AMG, 61,379 mi
Trunk will not close, $800
can't get the trunk open with electronic key or mechanical key. the dealer wants to break the 3rd light brake housing to open the trunk. help!