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-   -   trailer lights (https://mbworld.org/forums/glc-class-x253/734690-trailer-lights.html)

emccallum 02-01-2019 04:02 PM

trailer lights
 
Hello, I just bought a 2018 GLC300 for my wife. My first MB. Very nice driving car and so far she likes it more than the Lexus that got totaled several weeks ago. Luckily no one was injured. I ordered a hitch for the car. I am not planning to do any towing, but she uses it to bring the trash can down the driveway, and occasionally we need it for something else. The light kit that etrailer sent will not fit my car as mine has the premium 3 package. Anyone dealt with this before? I am not crazy about splicing into the harness as the wires are very light. I would prefer plug and play. I may just wait a while and see if someone makes a kit for my application in the future. The dealer said they send cars to Uhaul for hitches and lights. Not sure if I want them hacking into the harness! Any thoughts? Thank you.


K507 02-05-2019 09:45 PM

Check www.carid.com regarding trailer wiring for your vehicle.

emccallum 02-05-2019 10:45 PM


Originally Posted by K507 (Post 7673843)
Check www.carid.com regarding trailer wiring for your vehicle.

Thanks, I checked them out and they have the same kit as e-trailer, which will not match up to my wiring.

K507 02-06-2019 09:25 AM

I would find a dealer who would install per factory specs...sending you to U-haul is a terrible move on your current dealers end...

emccallum 02-06-2019 09:40 AM

Agree!

frandumont 02-06-2019 11:21 AM

The last summer, I install this part for the trailer light and it's work good
https://www.curtmfg.com/part/56146

The more difficulty is to connect on the wire of the light, It requires removing the right and left rear lights for connect the wires.

K507 02-06-2019 11:26 AM

^^^I believe the OP is looking for a 'factory' plug & play option...there are multiple aftermarket 'splicing' options but, this could lead to integration issues.

emccallum 02-06-2019 11:50 AM

They do make a plug and play kit but it will not work with my car because it has the Premium 3 package and appears to have different tailight connectors.

frandumont 02-06-2019 12:28 PM

Me I use this doc for make my installation, because the color code is include:
https://cdn.shopify.com/s/files/1/21...34328933424291
It's not a plug and play, but I think it's work with the Premium 3 package because you have just some more sensor, not more light. I thing it's just more complicated for install the hitch (for remove bumper), because you have some more sensor on bumper.

emccallum 02-06-2019 12:54 PM

Thanks Frandumont, that color code may be useful if I end up going with a splice kit. I already have the hitch installed, that was pretty easy. No hurry for trailer lights, so I am going to give it some time to see if someone makes a kit in the near future. I believe the difference in the premium kit is different connectors at the tail lights among the other stuff.

fabbrisd1 02-06-2019 11:44 PM

Just go "spliceless".... https://www.etrailer.com/Custom-Fit-...119250KIT.html

emccallum 02-07-2019 10:22 AM


Originally Posted by fabbrisd1 (Post 7675001)

Wow, that is a cool kit! Thanks.

fabbrisd1 02-08-2019 12:34 AM

And "spliceless" is transferable to another vehicle down the road ... it's the "new path"... keep the beat !

slk55er 02-11-2019 06:41 PM


Originally Posted by emccallum (Post 7670354)
I am not crazy about splicing into the harness as the wires are very light.

You probably know that wiring harnesses are not like they used to be in the old days where you could simply tap into an existing 12volt brake light line and a 12 volt tail light line. Now days the wires carry pulse width modulated (PWM) signals and one wire serves multiple functions via one bulb. I wired a Curt PWM module into my GLK350 in which one bulb receives the equivalent of either an average of 4 volts or 12 volts depending on whether it is serving as a tail light or brake light. I'm pretty confident that your vehicle will have a similar arrangement. You'll find a writeup of my installation here:

https://mbworld.org/forums/glk-class...asier-way.html

I believe you will find the PWM module for your GLC300 here:

https://www.curtmfg.com/towing-elect...ght-converters

Hope this helps

fabbrisd1 02-11-2019 06:53 PM

The new generation "spliceless" is specifically PWM compatible - with "spliceless" you make direct battery hookup to the module - the sensors create no interference or capacitance changes to your rear wiring at all ....... another bonus is the whole "spliceless" rig is transferable to your next vehicle .. no worries ..

Lexa 06-05-2019 12:01 AM


Originally Posted by frandumont (Post 7674327)
Me I use this doc for make my installation, because the color code is include:
https://cdn.shopify.com/s/files/1/21...34328933424291
It's not a plug and play, but I think it's work with the Premium 3 package because you have just some more sensor, not more light. I thing it's just more complicated for install the hitch (for remove bumper), because you have some more sensor on bumper.

And what about car warranty? If I will splice the wires to connect CURT 56146 or Tekonsha 119147 - will I have any problems with Dealership?

fabbrisd1 06-05-2019 12:22 AM

You won't have any warranty problems with MB on a correct installation of the Spice-In Modulite - but if you muck up the Modulite install - or have Modulite problem down the road (and Modulite is very reliable) you will need a hitch/trailer specialist fix it for you - MB dealer won't be able to help.

Frankly - for like $160 more - I love the "spliceless" since I can always move it over to my next vehicle


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