Andy welcome on board our nuthouse, I am sure you will fit right in!!! Listen, an answer is very tricky from the info you give us. If you accelerate hard from rest in the snow then you can provoke wheelspin and you can feel which are spinning, to understand if you have RWD or 4WD active, sounds like RWD as you mention. These cars have alot of electronics on board so one faulty module can easily trip loads of warning lights, so you will really have to wait for the replacement one to be fitted to then see what else is faulty, or not. Best of luck and please report back. Auto or manual?