mercedes 420sel deck

Ok so i have a customer coming in tomorrow with a Mercedes 420sel and wants a deck installed. On our system at work we don't list a dash kit because it's din fit which is fine but we also don't list a harness either.   I have a feeling i'm going to end up having to hardwire and bypass the factory amp. Has anyone done one of these that has any tips for me or things i should look out for? thanks -dave-A DMM is a beautiful thing.

MECP Advanced Installer Certified.

OK well since i didn't get any replies i'll just post up how it went so that i could possibly help others. Radio removal: remove ashtray under radio, then undo the 2 phillips screws holding the ashtray holder and pull it out. Then under the radio there are 2 metal "clips" holding the radio just use a pick and pull them both down then the radio will pull right out. Power, ground switched- at the factory wiring to the stereo just test them and you should find them quickly. power antenna- black female spade connector with 2 black wires going to it. Factory amp location- Behind the rear seats one on each side. I don't think i should have to go into how to test what wire goes to each speaker.... So i hope this helps someone out in the future.A DMM is a beautiful thing.

MECP Advanced Installer Certified.