I am continuously having problems with this. My car goes into limp mode, usually when it rains. It's been to an Audi dealer in PA who consistently can't fix the problem. Every time it's in they tell me it's not related to the control unit, they charge me for a different repair, this time a printed circuit board. Not fixed. Now they claim it's the control unit (for the trans by the way). Any suggestions??? This dealer has me up in arms.