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Lots of you seem to be experiencing a jerkiness with A/C on. I have a manual and haven't noticed that. I also don't notice much of a drop in RPM, but I haven't focused on that. I'll check it driving home today. Mostly what I notice is that it just seems to take more effort to get performance out of the car starting off and getting up to speed with A/C on - more pedal and noise but not a lot happening. The turbo doesn't feel as strong either. I really enjoy driving the car with A/C off, not near as much with A/C on, and sometimes it disappoints. I'm wondering if all the issues about DME programming (or reprogramming as the case may be) that are common topics on this forum factor in here. I took delivery of my 2012 car in December 2011 and have no idea what iteration of DME programming I've got, but I've wondered if it's giving me the full power and performance this car is supposed to have.
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2012 135i M-Sport 
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