I'm wondering if this is indeed the issue on my C230. No codes exist, at least that could be scanned by Autozone's free service (and I have no CEL).

Same symptoms, AND I have noticed a burning, rubbery smell when leaving the car for the past month. Burning cat? Crap.

I have no reason to think the MAS has been replaced in the car's 104k life. Then again, I did run a nice dose of techron maybe 2 weeks before this started happening, but I have run techron a half dozen times before.

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former: 83 300D, 97 C230, 93 400E

current: 08 C300 Luxury , 92 500SL