If anyone has a problem with their Haldex Control Module, don't bother asking for assistance from Haldex, they can't be bothered responding. My Unit stopped communicating with the ECU & the local Audi dealer quoted me AUD$4,800 for a new one (fitted). APS (Eurotune Gold Coast)came to the rescue, they sell a performance module to fix the problem at a very resonable AUD$1,800. Their service was second to none, I emailed Brisbane APS who put me in contact with Eurotune & booked me in the very next day, fixed in no time. It's great to see someone that ins't all about money but about customer service also.