OUTSIDE LEFT-FIELD THOUGHT:
Maybe have the dealership can look at the condition of your EDR or your EDR log cache and clear if that is so large new logs cannot be written (what happened with our C300 Sport and CC). The Electronic Data Recorder keeps logs running of certain events for crash reporting, and should only record 30-60 seconds, but if it cannot overwrite the cache, funny things might happen.
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-CDepp-
2011 MB Base+S M6 | Invidia Exhaust | TommyKairaHebiBeibi | H&R Spacers 15/20 | GTR Start | 305hp/240tq
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