Atoyot1031

Newbie here!

We just bought a 09 Gl320 for my DW's DD & to tow a new travel trailer. I've been lurking for awhile & already reinforced my hitch. We went to hook up the new TT today with a Anderson WD hitch & Prodigy RF controller.

Long story short, we were not getting a brake light signal out of the 7-pin connector. Turn signal & running lights worked, but no brake signal.

We are 6.5 hours from home in Salt Lake City & fortunately the SLC Mercedes Benz dealer snuck us into their schedule for tomorrow morning.

Anyone run across this? It sounds like it could be a SAM issue.

Thanks in advance!
Nick

Atoyot1031

Just wanted to followup. The dealership was able to clear the SAM and everything began working. There were no fault codes however.

Kropf

Wondering... I see that you said 'no fault codes', but did your display show "Trailer brake lamp"?

I get that as soon as I touch the brake pedal with the trailer plugged in.
(Turn signals work, and Emergency Flashers work and illuminates the bright filaments, but no brake lights on either of my two trailers (regular incandescent bulbs - not LEDs), although the GL's brake lamps work.)

Atoyot1031

No it did not. My display didn't show that anything was wrong. It was only when we were testing the lights that we found the problem.
Thx!