4-Way Trailer Wiring Harness for 2021 Mercedes GLC300

Question

Question:

Just bought a 2021 Mercedes GLC300 4Matic. Which wiring harness do I need to order to go with my Curt hitch?

asked by: Neal M

1

Helpful Expert Reply:

For your 2021 Mercedes Benz GLC300 the trailer wiring kit you'd want is the part # 118747 which is custom fit for an easy install and has a very reliable converter box.

expert reply by: Jameson C

1

Answer 1

We have universal trailer wiring harnesses that fit your 2020 Mercedes GLC 300 with the Tekonsha part #119147KIT. This ties into the taillight wiring of your vehicle with included quick splice connectors.

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Answer 2

Thank you for the pictures. You are definitely on the right track here. The Tekonsha #118747 is not intended for the models with the premium package. I will have customer service contact you for a return. I do not recommend cutting the plugs off of…

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Answer 3

The yellow plugs on the Tekonsha T-One Connector #118747 you have for your 2018 Mercedes-Benz GLC get plugged into the factory tail light connectors behind the access panels on both the passenger and driver side of the rear cargo area which is shown…

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Answer 4

According to our technicians the 4-Pole Flat Trailer Connector item #118747 will not work with any of the Premium Packages on the 2016 GLC-300. You will need to use the 4-Pole Trailer Connector and Installation Kit item #C59496.

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Answer 5

The Tekonsha trailer wiring kit part #118747 is a plug and play option that fits your 2019 Mercedes GLC 300 but does require running a wire up to the battery. This is because the taillights of your vehicle can't handle the amperage draw of the…

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Answer 6

We can get your 2022 Mercedes GLC300 setup to tow a utility trailer. You will need the Vehicle Wiring Harness Kit w/ 4-Pole Trailer Connector and Installation Kit, part #C59236. Once you add this harness kit you will be able to plug a utility…

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Answer 7

The Tekonsha T-One #118747 wiring kit will fit any 2016 Mercedes-Benz GLC300 that doesn't have the Premium 3 Package. I spoke with my contact at Tekonsha who said that all of the GLC300s come with LED lights so we aren't sure if you have the…

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Answer 8

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 9

The Curt #C13290 is confirmed to fit your 2017 GLC 300. I attached a picture that shows what this hitch looks like installed on a similar GLC as yours for you to check out as well.

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Answer 10

Trailer hitch installs are pretty basic for qualified mechanics. What we recommend people do is find a local garage with a good reputation to install the hitch. Otherwise, we do not have a specific recommendation for your area. The Curt hitch part…

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Answer 11

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 12

Yes, we do. To add a hitch to your 2024 Toyota Grand Highlander, I recommend the Curt Trailer Hitch item #C26VV. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a 2" receiver. It has a…

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4-Way Trailer Wiring Harness for 2021 Mercedes GLC300

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