Faulty relay or blown fuse the air suspension compressor relay is known to fail.
W220 air suspension diagram.
The w220 airmatic system is a fully supporting air suspension system which provides both static and dynamic support by means of four air struts located at the wheels.
1998 1999 2000 2001 2002 2003 2004 2005.
107 on the benzworld r c 107 forum.
If the air suspension compressor is kept engaged for too long it can get damaged.
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Introduced on the w220 s class for the 2000 model year mercedes benz began equipping various models throughout their lineup with an air suspension system dubbed airmatic.
Mercedes benz s class w220 1998 2005 fuse box diagram.
This system replaced the traditional coil springs found on cars leading up to this time with air springs with electronic level control and adaptive damping at all four corners.
It could either not engage the air suspension compressor at all or even worse keep it engaged for longer that required.
Fuse and relay box in engine.