I had the car in to the dealer today because I was really worried about it. The tech drove the car about 500yards, said this isn't the transmission, it's engine management, probably the MAA. He put it on the machine and apparently his diagnosis was confirmed. He showed me the print out but I can't remember what it said. The tech explained that when the air flow meter is defective, this can retard gearshifts and and generally confuse the car; the engine also felt down on power.

Sure enough, it runs like a dream again. Phew. Now, what can I do with that GBP5,000 I set aside for a new transmission...

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JJ Rodger
2013 G350 Bluetec
1999 SL 500
1993 E300 diesel T
1990 190