Guarantee or no guarantee?

Hello Who can help me with the following questions?My son bought an Alfa Romeo 156 TS in May 08. Now the seat heating doesn’t work anymore and the triangular handlebar also clatters while driving on a level road.Now he was in the car dealership where he bought the car and after a review he got the answer that the repair price amounts to about 700 €.Do not these defects fall under the used car warranty?So with the seat heating I am almost sure that the unt My first guess where the clapping comes from were the cathedral warehouses but also that he would have to pay himself because they belong to the shock absorber so the statement from the car dealership. Would I be happy if someone could give me some advice on this topic. MfG autodealer