Here is the stereo radio wiring information for your 2002 MB C230 W203 Kompressor body with the standard or amplified systems. It will be useful when installing an aftermarket radio, sound stereo system, or other automotive accessories. Make sure to grab the appropriate tools to test all the wires in your C230. Please check it over and use it as a GUIDE to help you locate the appropriate wires. This schematic is provided free of charge and may not be 100% accurate. Failure to properly test all the wires may lead to vehicle or bodily damage. All information is provided as-is and accuracy is not guaranteed.
If you find any conflicting info please leave a comment with what you found in your W203 C230. If you don’t see the audio radio wiring diagram you need comment and we will try to add it ASAP. Thanks for looking!
2002 MB W203 C230 Kompressor Audio Wiring Radio Diagram Schematic Colors
Car Radio Constant 12v+ Wire: Red/Blue
Car Stereo Ground Wire: Brown
Car Radio Ignition Switched Wire: Black/Yellow @ Cigarette Lighter Below Radio
Car Radio Illumination Wire: Gray/Blue @ Cigarette Lighter Below Radio
Car Stereo Power Antenna: Black (+) @ Radio Harness
Car Radio Amp Turn On Wire:
Left Front Speaker Wire (+) Positive: Light Green
Left Front Speaker Wire (-) Negative: Brown/Light Green
Right Front Speaker Wire (+) Positive: Orange
Right Front Speaker Wire (-) Negative: Brown/Orange
Left Rear Speaker Wire (+) Positive: Pink
Left Rear Speaker Wire (-) Negative: Brown/Pink
Right Rear Speaker Wire (+) Positive: White
Right Rear Speaker Wire (-) Negative: Brown/White
SPEAKER WIRE COLORS AT THE SPEAKERS IN THE DOORS
Left Front Door Speaker Wire (+) Positive:
Left Front Door Speaker Wire (-) Negative:
Right Front Door Speaker Wire (+) Positive:
Right Front Door Speaker Wire (-) Negative:
Left Rear Door Speaker Wire (+) Positive:
Left Rear Door Speaker Wire (-) Negative:
Right Rear Door Speaker Wire (+) Positive:
Right Rear Door Speaker Wire (-) Negative:
Center Channel Speaker Wire Positive / Negative: N/A
Subwoofer Speaker Wire Positive / Negative: N/A
Radio Size: Single or Double Din
Radio Removal Tools: Plastic Bezel Removal Tools to pop the shifter gear selector trim (don’t completely remove). Then pop the larger shifter bezel and remove that over the smaller one. Use the pick tools to remove the pocket and cigarette lighter bezel. Next use the pick tools to release the spring clips inside the vents and rotate the vents upward to reveal torx screws to remove using this Torx Driver Set. Return the vents to their normal position then use the pick tools to release the spring clips and rotate the vents downward to reveal clips up top to pull down a bit to remove the vent panel. After that remove the torx at the top of radio bezel, and the metal clips at the bottom then unplug and remove that bezel. (don’t turn the vehicle on once you unplug the airbag connector). Finally 4 screws hold the radio in.
Keep in mind if you are installing a new radio you need the wiring harness, the antenna adapter, steering wheel control module, and the mounting kit as well.
REQUIRED PARTS FOR AFTERMARKET RADIO INSTALL
BASE SYSTEM WIRING HARNESS:
MOUNTING KIT FOR DOUBLE DIN AFTERMARKET RADIOS:
(This kit can be used with double din radios only!)
MOUNTING KIT FOR SINGLE DIN AFTERMARKET RADIOS:
(This kit can be used with single din radios!)
STEERING WHEEL CONTROLS ADAPTER:
RECOMMENDED TOOLS FOR THE INSTALL – SAME ONES THE PROS USE!