Switches or more defective?

Hello, yesterday something annoying happened. At the XC70 Mj01 Geartronic, 2.4t AWD the reverse gear could be inserted, but the car did not drive. Speed remained idle. After some turning back and forth the idea came to me to turn off the air conditioning automatic and swoops again everything went as if nothing had been done. History: Gearbox already flushed, B4-Cover renewed, yet occasionally hard shifting strokes in the lower 3 gears, but only when car warmed up. Questions: 1. Is there a connection between climate and Geartronic, or was it more likely to happen? 2. I suspect the shift shifter. Is there any other sources of supply for overhauled SS besides this?http://shop.strato.de/…/?… 3. Can you buy the Solenoid Replacement Kit somewhere seriously in DE or EU?http://www.rostratransmission.com/…r-replacement-linear-solenoid.php I can’t say anything about error codes since I’m only coming to read out tonight. Rinse Björn