el-leakio

Hi, New here and have just bought an S4 B6. The drivers window was not working so believe I need a new motor. My question is, do the part numbers have to match exactly as Ive been unable to find one that matches bang on. 8E1959802 is the number on mine but ive found one with an F on the end, will this work? ALso where is says "MAX" on mine, will one that says "MIN" work? Thanks Also the central locking on the key died completely yesterday! Was working OK, suspected battery but I have changed it and no different. Pressing the button inside the car seems to lock and unlock fine. Using the key in the lock works fine to unlock all doors, but turning the other way only locks the drivers door and does not set the alarm, What could be the issue here? Is it linked to the motor as there are lots of cables going in to it? Bit of a pain as I cannot lock the car at the moment! Many thanks for your help