2018 Mercedes CLA250 Trailer Wiring Fit Recommendation for 4-Way

Updated 08/27/2018 | Published 08/25/2018

Question:

Has anyone done a diagram for a 2018 Mercedes CLA250 with LED tail lights yet? There is a 10-pin connector on either side. Left side has 8 wires attached and I think the yellow w/white is the turn signal/brake. On the right side there are 7 wires, I think the light blue w/red is the turn signal/brake for that side. So far, those are connected to the harness module without the +12 run from the battery. I havent let the smoke out of anything but if theres any suggestions I would appreciate them. I will post photos and information when the install is complete. Thanks!

asked by: Bill

Expert Reply:

The Tekonsha trailer wiring kit part # 119250KIT that you referenced is the correct kit for your 2018 Mercedes Benz CLA250 with LED taillights. The closest vehicle to yours that we have had the chance to install this kit on is a 2014 Mercedes GL Class which I attached the install video for. While the install won't be exactly the same it will show you the overall process and how to test the wiring of the vehicle to determine which circuit is the correct one to use.

expert reply by: Jameson C