7-Way Balde to 4 Flat Adapter Compatible with a 2008 Mercedes M-Class GL 450
Question:
I have a 2008 GL 450 M Benz Will this adapter work for this vehicle Cant seem to get others with the same pin config to work Any help will be appreciated
asked by: Dennis R
Expert Reply:
If your 2008 Mercedes 450 M GL model has a 7-Way connector, and your trailer uses a 4-Way flat, then the Pollak 7 Pole to 4 Pole Connector Adapter, # PK12716, will work. The unit plugs into the 7-Way socket on your vehicle and the 4-pole on the trailer plugs into the back of the adapter. We actually have many of this set up. I have included a link to them below.
If you are not receiving any power or signals from your vehicle side connector, that could be the reason nothing has worked. You will need to check the plug for functions using a circuit tester like # PTW2993. Test for the 4 functions that the 4-Way flat connector can receive. Top left is tail and running lights. Right center is right turn and brake. Left center is left turn and brake. Bottom left is the ground. The circuit tester should show a signal in unison with the blinkers when engaged. The running lights should show a constant signal when the vehicle lights are on.
If you are not getting these results, your 7-Way may not be correctly wired. Take a look at the wiring FAQ linked below. About half way down you will see diagrams for connectors. Look for the one that says, 7 Way Vehicle Connector. The diagram on the left shows what the functions are if look at the face of the plug. The other one is the back of the plug. The wire color on the Tiguan could vary but the functions should be the same as you see in the diagram. If they are not, take out the wires and put them in the correct spot. Then the trailer lights should work. If they still do not work, then make sure your trailer wiring is correct according to the diagrams throughout the FAQ.
Products Referenced in This Question
Product Page this Question was Asked From
Pollak 7 Pole to 4 Way Connector Adapter
- Trailer Wiring
- Wiring Adapters
- Single-Function Adapter
- 7 Round - Blade
- Plug Only
- 4 Flat
- Pollak
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Article: Trailer Wiring Diagrams
- Shop: Trailer Wiring
- Search Results: tr20141
- Search Results: 12~716
- Q&A: Recommended 7-Way to 4-Way Adapter for 2012 Mercedes-Benz GL450
- Shop: Pollak 7 Pole to 4 Way Connector Adapter
- Shop: 7-Way to 4-Way/5-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs
- Q&A: 10k Dexter Replacement Hub for a 8-415
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: 44649
- Video: Choosing the Right Trailer Wiring
- Shop: Grease Seals 10-36 (pair)
- Shop: Trailer Hitch
- Video: Choosing the Right Brake Controller
- Shop: 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Search Results: 68149
- Q&A: Wiring a Camper Shell Third Brake Light on a 2017 Chevrolet Silverado
- Q&A: How to Determine if Trailer Axle is Not Aligned and How to Measure to Replace Trailer Axle
- Shop: Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Shop: Brake Controller
- Article: How to Choose the Right Trailer Hitch Class
- Search Results: 25580
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: dust cap
- Video: Tow Ready 4-Pole Mounting Bracket Installation
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Fifth Wheel Hitch
- Video: etrailer Class III Trailer Hitch Installation - 2016 Jeep Cherokee
- Shop: Gooseneck Hitch
