Sorry, the NHTSA has not posted this TSB document yet.
You can still get the detailed info from Mercedes-Benz for this TSB. Call your local Mercedes-Benz dealer's service department & ask for a copy of TSB# SB-2008080001.
Affected Component: SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM
MERCEDES: CHECK AIR SUSPENSION COMPRESSOR AND REPLACE IF NECESSARY. INSUFFICIENT AIR PRESSURE IN THE AIR SUSPENSION SYSTEM MAY RESULT FROM DAMAGE TO THE PRESSURE DISK IN THE AIR SUSPENSION COMPRESSOR. *PE