w220 weird suspension problem

[Kimblece]

2000 S500 w/o 4matic
116k

Replaced struts (front) all went well suspension normal.

One month later:

Car rises as it suppose too, when it reaches ride height, it lowers, but not on stops. The ride is really rough.
The "stop car warning light" does not come on, as the car is really not that low.

When i press the switch to raise the car it raises.
The funny thing is that i don't hear the pump any more, only ait going into something.
can this problem be a relay or fuse ( where are they?) or is this a fail compressor, please help, this is only happening on the front, back seems fine, i hope. can anyone please help

Charles Kimble
2000 S500
1992 190E 2.6 224K
2007 S550 19K