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Troubleshooting 4-Way Installation on 2021 Mercedes-Benz GLC  

Question:

Yellow connector on the t dont matchup with the tailight harness connector

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Expert Reply:

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 have a connection point, on both sides, matching the ends of the T-One Connector. The green wire should be on the passenger side and the yellow wire on the driver's side.

expert reply by:
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Robin H

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