Trailer Hitch and Wiring for a 2014 Mercedes GLK 250 Bluetec

Question

Question:

Recommended after-market tow package: trailer hitch and electrical harness. I mainly intend to use for a hitch bike rack, but on occasion, would like the flexibility to tow a trailer full of mulch, small boat, jet skis... Also, who would you recommend install it all...if it looks too overwhelming to me?

asked by: Mike

0

Expert Reply:

First, for a trailer hitch that fits your 2014 Mercedes GLK 250 BlueTec there is one option; Curt trailer hitch # C13155. And for a trailer wiring harness I recommend # C59236 since it is designed to work with 2 or 3 wire electrical systems and PWM (pulse width modulation) systems so pretty much all scenarios are covered.

A trusted mechanic or RV dealer with a service center could perform the installation for you.

When using the hitch for towing you can use ball mount # C45030. For a 2 inch ball use # 63845 and for a 2-5/16 inch ball use # 63847. The ball mount has a 1 inch rise and 2-1/4 inch drop. If the ball mount does not have the right rise or drop to tow the trailer level, use the link I have included that explains how to measure to choose a ball mount to tow the trailer level. Be sure to consult the vehicle owners manual for the vehicle capacities prior to towing.

Curt also says you have to use stabilization strap # 18050 when using this hitch for any non-trailer load (such as a bike rack or cargo carrier) per their warranty requirements.

expert reply by: Michael H

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Answer 1

You have it right so far, the 4-way connector is just as you have stated. Remember that Yellow has a L in it so that is the left side brake/turn signal and green has a R in it so that is the right side brake/turn signal. The colors for wiring a 7-way…

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Answer 2

The Curt trailer wiring part #C56496 is the confirmed trailer wiring recommendation for a 2014 Mercedes GLK like so it would be a great option if you are looking for trailer wiring. This is a universal type kit that will require hardwiring to the…

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Answer 3

We haven't had the chance to install the Curt Wiring Harness part #C59236 on a 2013 Mercedes GLK 250 so I do not know the correct color wires you would need to use. However, I attached a video that shows exactly what you will need to do to…

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Answer 4

To answer your first question, there isn't a traditional "adapter" to allow the 7 way on your trailer to plug into a 4 way connector on your vehicle- at least not in the manner that you're thinking of. For that reason you would…

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Answer 5

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 6

For a hitch for your 2014 Mercedes Benz GLK 250 you would want the Curt Hitch part #C13155. I spoke to Curt and for wiring they recommend the Curt 3 Wire to 2 Wire Converter #C56190. For a ball mount, hitch ball, and pin and clip, I would recommend…

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Answer 7

To add a brake controller to your 2015 Mercedes-Benz GLK 250 you'll need a 4-way (different than the one you mentioned), and 7-way. The 4-way will plug into the 7-way and will give you all the needed signals. The correct fits for your Mercedes…

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Answer 8

There really isn't much drilling required to install the Curt hitch part #C13155 that you referenced on your 2015 Mercedes GLK 250. If you check out the picture I took from the install instructions you can see the section (with pictures) that…

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Answer 9

The plastic trunk shield should not have to be permanently removed to install Curt hitch #C13155 on a 2014 Mercedes GLK250. I believe that it was in reference to step 4 in the instructions I have linked for you. But as you can see it does not have to…

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Answer 10

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 11

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 12

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Trailer Hitch and Wiring for a 2014 Mercedes GLK 250 Bluetec

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