what's that rattling/squeaking noise?
 

My E500 has 62k mi. When the suspension is in Airmatic Sports I or Sports II and when going over small bumps or making turns, sometimes I can hear some squeaking noise but not able to pin point the source/location of this noise. There's no noise when in the standard Airmatic comfort mode. I've read a thread that this problem could be related to a loose air compressor bracket. Any idea where it is? Has anyone else experienced this problem?