mercedes c320 2003 radio wiring diagram

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Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=113691
Printed Date: May 10, 2025 at 1:31 PM

Topic: mercedes c320 2003 radio wiring diagram

Posted By: kc_457
Subject: mercedes c320 2003 radio wiring diagram
Date Posted: May 08, 2009 at 5:30 PM

Hi. Can you help me get the wiring diagram for the radio? I cannot find the switched power wire. What solution are there for this? Thanks

Replies:

Posted By: slab42
Date Posted: May 08, 2009 at 6:38 PM

What are you installing? If you don't need much current, you could go to the cig lighter for switched power, or if that is not switched, go to the ign. harness. If you need a little more current, use either of those sources to trip a relay and get power at one of the main power wires under the driver's side dash or go directly to the battery.

Posted By: howie ll
Date Posted: May 09, 2009 at 1:57 AM

They never had an ACC feed after the late 90s, the fatory radios switch via data. Go to the ciggie lighter, or if you need high power, fire a relay and divert a feed from battery or fuse box entry, also a stud under one of the front carpets where the main battery feed goes through to the engine bay.

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