MMI(R) - No Sound From Audio Sources: Overview
91 3G MMI: No sound91 12 36
2024513/4
February 14, 2012.
Supersedes Technical Service Bulletin Group 91 number 11 - 26 dated December 1, 2011 for reasons listed below.
Affected Vehicles
Condition
^ No sound from all audio sources on vehicles without separate amplifier (standard sound system).
^ No sound, only from the radio on vehicles with separate amplifier (premium sound system, Bose or Bang & Olufsen). All other audio sources function normally.
Tip: This TSB does not apply to vehicles with a separate amplifier and the complaint "No sound from all audio sources."
Technical Background
Hardware-related issue in the radio.
Production Solution
Improved radio hardware and new software (ZUG 0114).