wiring for '93 mercedes benz 400sel

I need a car stereo wiring diagram for the '93 400SEL.....Bought the car with just the sppeakers in door connected.....want to re-connect rear deck speakers....BOSE amp is still in car....THANXbig gee

Audio/Mobile Video        WIRE COLOR POLARITY LOCATION LF Speaker (+) WHITE LF Speaker (-) BLACK RF Speaker (+) WHITE RF Speaker (-) BLACK LR Speaker (+) WHITE LR Speaker (-) BLACK RR Speaker (+) WHITE RR Speaker (-) BLACK Steering Cntrls NO Speed Cntrl NO Radio Security YES

are they disconnected behind the radio? do you know if the rear speakers are just disconnected because they may just be blown. is the system running off of the factory head unit or is there an aftermarket head unit installed?

The previous owner had a custom system so there is an aftermarket head unit connected.....the four doors are connected...the bose amp is still in there...however i do not know if it is connected.....just got some speakers for the rear deck from another Benz....i see no wiring for the rear deck in the trunk.....so i need to know what im lookin at once I pull the head unit out...

big gee

And the speaker behind the rearview mirror is still there alsobig gee

from old notes, wiring at amp: RED / white x2...battery, brown x2...ground, grey/white & grey/RED / white...R woofer, grey & grey/red...L woofer, grey/white & grey/green...R rear, grey & grey/red...L rear, grey / YELLOW & grey/white...R front, grey & grey/red...L front, grey & grey/brown...center channel, red, yellow, blue, white...amplifier inputs. have brown, BROWN / green, and BROWN / red left as well as amp remote...forgot to tag that color.

Thank u....very helpful.....maybe the remaining wires are for the security.........thanx again.....very much appreciatedbig gee