The issue is not the lights per se (although the lighting nanny will not
like the extra power draw and will want to tell you there are various
faults if you plug stuff directly into the light circuits). For my 163
ML I got this thing that basically sees the voltage going to the various
tail lights (via some of those clamp-on connectors) then sends power to
the trailer lights through separate power so it is not in the nanny
circuits. I'm sure there is a similar item for whatever flavor his ML is.
The biggest issue is that the brake and stability control sensors will
feel the trailer back there and the nannies will go insane trying to
compensate for it. That is why you need to get the towing nanny and get
it working in the overall system. The 163 does not have this "feature"
so it is kinda indifferent to the hitch and load, other than the lights.
--FT
On 1/17/22 2:06 PM, Allan Streib via Mercedes wrote:
For my Volvo I got an adapter from etrailer.com that plugs into the factory
harness at the taillight pigtails. No cutting or splicing wires. It has a
separate 12v connection to power the trailer lights so it doesn't change the
load on any of the factory brake/turn/parking light circuits.
I have also seen adapters that clamp on to the wiring and detect current by
induction.
I'd try to avoid splicing directly into the wires, either with cutting/soldering or
"quick splice" crimp-ons that pierce the wire insulation.
Does the dealer sell a wiring adapter for trailer lighting?
On Mon, Jan 17, 2022, at 1:02 PM, Buggered Benzmail via Mercedes wrote:
If the car doesn’t have towing setup you will have to try to add the
nanny and get a new controller happy. It is not easy. The brake and
stability controllers and the lights will not be happy without the tow
nanny.
--FT
Sent from iFōn
On Jan 17, 2022, at 12:46 PM, Robert Massmann via
Mercedes<mercedes@okiebenz.com> wrote:
I miss his words of wisdom. “There is only one way to drive a Mercedes like
you stole it!”
Bob Massmann
From: Rick Knoble
Sent: Monday, January 17, 2022 11:15 AM
To: Robert Massmann
Subject: Re: [MBZ] Looking for My next Mercedes
I would like to get a hitch on it to tow our popup camper.The trailer wiring is
going to be an issue. The computer that controls the lighting (EVERYTHING is
controlled by a computer on that SUV) is not going to like any changes. It
would be best to inquire about that on the main list. I know NOTHING about
Mercedes newer than 2008 or so. Geeze. The caps look like I'm channelling
Marshall Booth. Enjoy!
Rick
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--
--FT
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