Hey Megan, I can definitely help set you up with a wiring kit for your 2017 Mercedes GLC 300. Your GLC is the SUV correct? If so, I recommend the Tekonsha T-One Vehicle Wiring Harness # 118747. This will give you a 4-flat plug, which is the same plug used on the U-Haul cargo trailers. This is a standard T-harness so installation will be pretty straightforward. You will plug in behind the taillights on each side, and you will run a wire to the battery to power the converter.
I am afraid... view full answer...
There are only two ways the # 118747 won't line up on your 2021 Mercedes-Benz GLC. The first is if you have the coupe and not the SUV. The other is if you have the premium package. Neither of these are compatible with this wiring harness. If that is the case, you need the # C59236 if you have the SUV with the premium package or the # C59236 for the coupe.
If that is not the case, make sure you have the correct connector on the correct side of the vehicle. The taillight wiring harness will... view full answer...
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