I just acquired an '85 190E, I need help wih the audio electrical schematic.

does anyone have a drawing or information for a "Becker" model 612

SN# HS 6187707? Removable AM/FM cassette player.

I dont have any diagrams, but heres the wire colors.

Memory (+12v Constant) Red
Ignition (+12v Switched) Black/Yellow
Ground (-) Brown
Illumination Gray/Blue
Dimmer (none)
Power Antenna Blue

Speakers
Right Front (+) Black/Green
Right Front (-) Black
Left Front (+) Black/Red
Left Front (-) Black
Right Rear (+) Black/Green
Right Rear (-) Black
Left Rear (+) Black/Red
Left Rear (-) Black

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1985 Mercedes 190E 2.3(Sold)