Hi Pizzaguy,
I really appreciate the help you give, but I don't remember how the lights behaved when the alarm worked. The few times the alarm was triggered before, I turned it off as soon as I could because of the noise. I didn't study in detail what happened on those occasions. But that' is part of symptom-function troubleshooting. I understand that you did not do it back then, I get that, my questions were to prompt you to do it now.

What works today is the switch on the dashboard to lock or unlock the doors. The pump starts in the CLP/SSM unit so it works. But of course, the alarm doesn't activate and it shouldn't. You are making an assumption there. The commands from the dash switch are not the same as the commands from the SKREEM, even tho they both go thru the BCM.

If I lock with the FOB, the alarm (siren) starts immediately, nothing else happens, nothing locks. And I wrote wrong earlier, the green turn signal lights on the dashboard don't flash either. They did before when the alarm worked. But does the siren continue to go off or is it a momentary thing? YOu continue to make vague statements to someone on the other side of the world who is trying to help, but you withhold information in every response.

The siren that is installed today only has 2 cables in, +/-. No separate power input. The original has 3 cables in, two of which are for power, the third is the signal input from the CLP/SSM. I don't think the CLP/SSMM unit can deliver the current needed and that they put a relay in between to make it work, but I don't know how much current the CLP/SSM can deliver. Some amperes into the siren and it sounds loud. But this isn't a problem, it has worked earlier. I have no clue what they did here, the original siren is powered by fuse 13 or 9 and the CLP/SSM sends a trigger signal to the siren, it does not and cannot power the siren.

It's common for them to reroute the cables for the turn signals and rewire them and maybe some other wires here in Sweden. Some stupid rules that have to be met that cause problems and cost a lot of money. I hope to figure out what they did to the car's electrical system later, I can see traces of what they did in some places. And this alone means that I can't help. I have no clue what they do.

I've taken the CLP/SSM unit apart and can't see any water ingress or corrosion damage. If I'm unlucky and it's defective, you wrote that it doesn't need to be programmed. What do you think, can I replace it with a CLP/SSM from any Mercedes from the years 1997 to 2004? My unit has a Mercedes logo on it. You want the unit from another Crossfire, coupe or Roadster. As to what other Mercedes pumps work, I cant say. I suspect the SLK320/32AMG unit works but since the CLP/SSM is more than a pump, but is the brain of the security system, I am unsure about that. I've never used a non-Crossfire part. I do know the pinout of the wiring harness is different.

I think we can wait a while now until I examine the tailgate switch, or if it is the cable to it that has become pinched.

Very good information you gave: "The anti-theft/alarm system is integrated in what they refer to as the 'Power locks', so no.", thank you very much, I have been looking for that information!

Thank you very much for your help, I will be back!


For the reasons above, I am withdrawing from this, I can't help with a car modified like that, unless I can stand there and take the time go to thru it personally. With the mods you say they make to cars over there, you want to talk to someone who understands what exactly is done to comply with what ever laws there are. I would download the service manual and start making notes as I talk to those who know.