Using an Adapter to Tow a Trailer with LED Lights with a 2012 Mercedes GL450
Updated 12/06/2013 | Published 12/05/2013 >
Products Featured in This Question
Question:
I have a 2012 Mercedes Benz GL450 suv that will not drive a trailer with LED lights. Is there and adapter I can purchase that will hook up to my factory hitch output that will fix this issue?
asked by: Steve C
Expert Reply:
Yes. If your trailer with LED lights has a 5-Way or 4-Way flat connector then you would use adapter # C35FR. If the trailer has a 7-Way connector you would need # C57003. These adapters have load resistors in them that provide additional power draw so the vehicle thinks there are incandescent lights on the trailer.
The other option is to install load resistors, # DI34ZR, in line on each circuit on the trailer wiring behind its connector. You can also use this method if the resistors in the adapters does not add enough power draw.
Product Page this Question was Asked From
7-Way to 4-Way/5-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 7 Blade to 4 Flat
- 7 Blade to 5 Flat
- Plug Only
- CURT
more information >
Continue Researching
- Q&A: 7-Way to 4-Way Adapter with LED Resistor Solution
- Q&A: Is There A Light Kit Available For The Kuat Piston Pro Bike Rack?
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Availability of Loading Ramp for RockyMounts Bike Rack on 2018 Sprinter
- Q&A: Trailer Hitch and Suspension Enhancement for 2026 Toyota Sienna With VelociRAX Vertical Bike Rack
- Q&A: Recommended 5,200 lbs Timbren Axle-Less System
- Q&A: Recommended Optronics Thinline Trailer Light Bar w/ Smoke Lens
- Q&A: Recommended 7-Way to 4-Way Adapter for a Mercedes Benz Sprinter
- Article: How to Measure for Trailer Hitch Drop
- Article: Trailer Wiring Diagrams
- Article: Ball Mount Basics: Weight Capacity, Class, and Size
- Article: Brake Controller Installation: Starting from Scratch
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Towing a Trailer? Let's Talk About Brake Controllers

