My bad, I ment 528i. Well, I don't know if that is the problem but the Battery charge red light comes on and off. And I was reading the owner's manual and it said that it could be a defect in the generator drive belt or the charging circuit. Also, I have noticed that the coolant temperature gauge raises as far as the edge of the red sector but never to the red zone. After a few minutes the neddle comes back to its normal position. So, this being said, maybe a faulty generator V-belt is not giving enough power to the water pump??
What do you think?
Thanks BD