Satelite Radio - Acquiring Signal
I understand SIRIUS XM is continually conducting transmission testing causing short audio interruptions/mutes in certain channels around 35 channels may experience this condition. Cause is outdated firmware in the receiver remedied over the air from SIRIUS XM embedded in programming taking place during reception of satellites.
The update you had installed should have been a Telematics update for MY08 & 09 whereby the headunit software is updated with service disc 211589162200 (DTB S-B-82.60/640a) to receive XM programming.
I would contact SIRIUS XM to see if applicable firmware update(s) associated with MB receivers is complete. If so, then I would suggest having your dealer revisit if receiver installed at production is part 2118703389 it is replaced by 2118706790 that may resolve the malfunction.



