As a new 300CD owner (I love this forum) I am updating my car and one of the updates is the alternator. Due to plans of updating the stereo I am installing an AL129X alternator in place of the original 55 amp. The question is that my car has 3 wires on the alternator and of course the new alternator has a completly different wire attachment system. Due to national backorder on service CD (MB) I have no access to the wiring diagram and was hoping for some help on which wire goes where on the new alternator...Any help would be greatly appreciated.......