mercedes wiring harness | eBay Find great deals on eBay for mercedes wiring harness. Shop with confidence. Skip to main content. eBay Logo: ⭐ 2013 - 2015 MERCEDES GLK350 X204 3 ENGINE CABLE WIRE WIRING HARNESS OEM (Fits: Mercedes-Benz) Pre-Owned. $249. or Best Offer. Free Shipping. 1992-1995 MERCEDES w140 S500 S420 ENGINE WIRING HARNESS 1405401132 UPDATE 2001. Mercedes Benz Wiring Harnesses - Sonic Electronix Are you in the process of replacing your Mercedes Benz factory radio with an after-market car stereo? Avoid having to cut OE plugs and making a mess of it all! Our Mercedes Benz wiring harnesses can help you perform a clean installation without hassle.