My K Reg 9000 CDE overheated in traffic the other week. Seems that the cooling fan on the radiator is on the blink. I was quoted 400 quid for a new one fitted which shocked me(!) A Saab dealers got me a used one for 30 quid. My question is, does it matter that my old fan has 6 or 7 fins and my new one only 3 larger ones ? I hope it isn't the wrong one as the garage is 40 miles away (!) Thanks K.