Replacement alarm siren

[Taffy7hfa]

New part came today from MB Grangemouth, thanks chaps the old one was a bit of a mess , no wonder the car was going crazy

 

[mioba]

Good stuff on tackling that. ....and all fitted and behaving.

 

[Taffy7hfa]

Not yet, will have to wait until the weekend now, I'm pretty confident it will fix the problem though.

 

[mioba]

no doubt looking at the original....
keep us posted and good luck

 

[sonic]

MB should be able seal that alarm watertight, this is not the first one on the forum.

 

[AMGeed]

You should notice a beep on locking the car after fitting the new alarm.

 

[mattkh]

Not yet, will have to wait until the weekend now, I'm pretty confident it will fix the problem though.

Please, look at the old and new alarms to find out who manufactures this alarm. Any info will be appreciated.

 

[mioba]

I would be consideruing at getting some sika around the joints on that. but then again the cost of sika is not cheap fot the amount you would use.
It may be they are not super sealed as they need to let heat out.
Considering they last a good amount of time, I probably would just replace makiing sure any potential openings in the device are facing down/away from areas of potential dirt/moisture ingress.

 

[Taffy7hfa]

I would be consideruing at getting some sika around the joints on that. but then again the cost of sika is not cheap fot the amount you would use.
It may be they are not super sealed as they need to let heat out.
Considering they last a good amount of time, I probably would just replace makiing sure any potential openings in the device are facing down/away from areas of potential dirt/moisture ingress.

Its a good shout although I'm not sure if it is a moisture related problem, my understanding is that the batteries inside the unit start to break down over time its the acid that then kills the PCB. I know its a really common problem on lots of 15-20 year old Mercs. The unit is not in an especially vulnerable location on the ML either its tucked away under the scuttle below the wiper assembly.