I think I would just let them do it. If they mess anything up they'll fix it.
It sounds as if it is the actual unit since external items like your steering wheel are fine. The only other thing I would try is to get behind it and be sure your cables in the rear of the unit are seeded fine. But if something happens it kind of becomes your pain, I'd still let the dealer have at it.
It sounds as if it is the actual unit since external items like your steering wheel are fine. The only other thing I would try is to get behind it and be sure your cables in the rear of the unit are seeded fine. But if something happens it kind of becomes your pain, I'd still let the dealer have at it.