Aftermarket CANBUS Alarm for a R171 - Mercedes Benz SLK Forum

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#1 Old 3 Weeks Ago
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Aftermarket CANBUS Alarm for a R171

My car did not get an alarm at the factory. Does anybody have experience with fitting and using an aftermarket CANBUS Alarm in a R171? The install should be much cleaner because activation and triggering could al be done from signals in the CANBUS system.
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#2 Old 3 Weeks Ago
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Sorry, no idea. But what about the sirene that the car is fitted from factory?

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No idea either.
But as I understand it, these aftermarket canbus alarms rely on the presence of can messages generated when you open a door,open the hood,inclination sensor,etc.
When I look at the description of how the original alarm functions, the rear SAM acts as the controlling unit and gets input from the door switches,hood switch and several sensors by discrete wiring.

So I'm not sure whether there will be can messages present that could be used to trigger an aftermarket alarm. Could still be you'll have to do a lot of extra work in installing switches and sensors to get the aftermarket one functioning.


Block diagram as info:
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Thanks Pete. Looking at the documention of Aspire they only have a CANBUS alarm model for the R172 not the R171. These guys do offer the Aspire for the R171:
CAN-Bus-Alarmanlage-fahrzeugspezifisch-fuer-MERCEDES-SLK-R171-ab-Baujahr-2004-bis-2011

Alarmconcept do have one for the R171:
Alarmanlagen-fuer-PKW-fuer-Mercedes-SLK-R171-Alarmanlage-CAN-BUS-2

Prices are generally around EUR 300,-

Anyone has it fitted to his car?
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