Leaks in the pneumatic system will cause problems with the dynamic seats and the trunk and/or door closing assist.Google+
Car Problem Reports
Mercedes-Benz SL500 Pneumatic System Leaks May Cause Problems With Seats, Trunk, and Doors
Mercedes-Benz SL500 Problem
Average Mileage: 59,412 mi (31,900 mi - 120,000 mi)
Visitor, 2005 Mercedes-Benz SL500, 33,402 mi
Trunk closing blows fuse
Visitor, 2004 Mercedes-Benz SL500, 41,000 mi
The 2004 MB SL500 is a lemon! Designed to fail!
Had to "slam" trunk. Dealer repair (at my expense) of pneumatic sensor.
Visitor, 2003 Mercedes-Benz SL500, 44,000 mi
problems with pse pump..will be replaced for second time