Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 01-21-2011, 05:52 PM
Registered User
Join Date: Jan 2011
Posts: 5
Trailer wiring help for a W210 wagon?

Hi, I purchased a detachable Bosal towbar while I was in Europe last week, along with all the electrical wiring and 7-pin plug outlet, also got the 7-pin male end to wire onto my trailer as US style is different with only 3-pins, seems to be for brakes only.

I installed the towbar yesterday and wanna do the electricals soon as well. The Bosal dealer told me there should be a plug in the trunk of my MB, which he normally sells an adapter for but he couldn't get it in time before I had to come back to the States. He told me to just vampire clip the trailer wiring to the wire coming off this plug in my trunk. Ploblem is I have yet to find this plug (tho I'm sure its there) and even when I do I don't know what pin or color is for what. I really want to avoid the ghetto method of tapping into my tail lights as I'm sure it will trigger the "lamp malfunction" warning that is so annoying on the late model W210's.

Any chance a someone has the pin out or schematic to the tailer wiring plug? Really looking forward to towing my race bike instead of begging friends to borrow their pick up truck!

Reply With Quote
Old 01-21-2011, 07:01 PM
Registered User
Join Date: Jun 1999
Location: Albuquerque, NM USA
Posts: 1,946
See attachment

Note that "3 pins" isn't enough, as it has to be at least 4
left signal/brake
right signal/brake

The euro wire harness does NOT combine turn signals and brake, just as they aren't combined on your car. You'll either need to change trailer lights or fit an additional "converter" to use your current trailer light system.

euro 7 pins

brake lights
left signal
right signal
backup lights
rear fog
Attached Files
File Type: pdf trailer.pdf (481.7 KB, 561 views)

Kent Christensen
'07 GL320CDI, '06 SLK350
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 09:38 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page