westfalia towbar wiring diagram for 2001 E 320 CDI estate

[aa1]

Has anybody got any info on this diagram, I got a genuine merc towbar seconhand complete with 13pin socket and wiring but no instructions as to how to install. I can't seem to find anything on the website. TIA AA1

 

[OlafMaxwell]

I had a look in my car, there is a wiring loom which passes from the space behind the passenger side rear wheel, under the spare wheel, and goes out under the floor of the boot to the tow bar. The holes and grommets should already be there. I presume you mean the detachable tow bar. You can get the adaptor from 13 to 7 pin from the MB dealer.