Last year I planned to remove the anti-theft alarm from my 2001 ML430 before selling it so that I could install it in my 2005 ML350. For one reason or another I didn't get to complete the project, but as I got good advice on the forum then I am well placed to do it now - except that now I want to install it in my 2001 ML55 instead.
My initial post last year is here : https://www.benzworld.org/forums/w163...m-ml430-4.html
This time it will be easier because :
1. the ML55 has part of the alarm system already installed - relay K31 and fuse F48 are in place
2. if I wind the window down, lock the car, reach in through the window and open the door from the inside then all turn signal indicators flash for several minutes (my ML350s don't do this)
But there is no alarm horn installed on the firewall and no pre-wiring for same.
So I removed relay K31 and with the ignition off I tested the relay socket and got +12.2 volts in slots 30 and 86. This is to be expected.
With the relay reinserted, and fuse F48 removed and the ignition on or off I got 0 volts on both sides of fuse F48 socket. This is to be expected.
So then I triggered the alarm (as in 2 above) and I got anything from 3 volts to 12 volts on one side of fuse F48 socket for about 30 seconds before it fell to 0 volts. My multimeter takes several readings per second so I expect its just displaying a reading as the 12 volts builds and collapses - I guess this is is the alarm horn (if it was installed) being pulsed.
So far, so good.
So then I unscrewed and flipped over the fuse/relay board to take a close look at connector MR/D.
Sure enough, the orange wire that should go from socket 11 in the MR/D connector to the alarm horn is not there.
So to get the alarm horn working I need to run a new wire from socket 11 out of the e-box and to the new alarm horn I will install on the firewall.
The MR/D connector is part #1635450426
When I search on this part it shows up as part labelled 347 "Plug Socket" here : ENGINE CABLE HARNESS,BODY MOUNTED. Fits: Mercedes | Mercedes-Benz of South Atlanta
Looking at the parts diagram, part 347 is associated with part labelled 368 "Contact Spring, Plug Socket". This is part # 0105458626
My question is, is the connector I need to install in socket 11 this part ... "Contact Spring, Plug Socket"?
I'm trying to make sure the dealer doesn't fob me off because I can't be specific about the part I'm after. It's probably only a $2 item.
I also found this source - see the part labelled 95 which show what it might look like : | 1418 | | Запчасти для Mercedes | Каталог запчастей Мерседес, подбор автозапчастей для Mercedes по автокаталогу.