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Are you having any typical symptoms? Some of them are:
1. Sometimes harsh and reluctant 1-2 shift.
2. Sometimes harsh 3-2 shift.
3. Slip or hesitation in first gear from a standing start.
4. Going into "limp home" mode seemingly at random.
1 & 2 can be resolved (usually) with the updated ETC. #3 is usually solved with a new pressure control spring. #4 often means the "sensor plate" (whatever the heck that is) is bad.
I've talked to a few early build 722.6 owners that had some updates done (ETC, valve body and sensor plate) and the tranny is doing very well. The most disconcerting problem is the slipping as the car really feels poorly when pulling away. The 3-2 downshift problem is annoying.
Some owners experienced problems very early on, and the tranny was replaced, but problems persisted.
Don't get on MB too badly. For some strange reason, lots of makers are having problems with five speed auto-boxes. Toyota (Lexus) and Honda (Acura) have buckets of faulty five speed slushies that have problems. BMW has five speed box problems too. Same for Air Mass Meters. Funny that everyone is having pretty much the same problems...
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