deck into benz w/factory alarm?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=25234
Printed Date: July 16, 2025 at 3:32 PM

Topic: deck into benz w/factory alarm?

Posted By: IIrjII
Subject: deck into benz w/factory alarm?
Date Posted: January 25, 2004 at 1:04 AM

Hi. I have a question. I work for best buy as an audio installer and I am fairly new. 2 days ago we had a mercedez benz with a factory alarm in it. I believe it was a 88 or 89. Well, when we installed the deck, the factory alarm kept going off. The only way we could get it to stop was disconnect the battery. Well, the benz stayed over night and I didn't see how they fixed the problem because I had the next day off. Anyway, I don't think they completely fixed the problem but its gone now. Does anyone have any tips on installing decks into a benz with a factory radio to avoid this problem? Is there a way to hook up an aftermarket deck into the benz with a factory alarm so that it retains the alarm? Thanks.

Replies:

Posted By: fatalglitch
Date Posted: January 25, 2004 at 1:52 AM

I also work for Best Buy, store 293 (Rockville, MD). I've had quite some experience with Mercedes, and have never run into that problem. Be wary though of all benz's. The radio memory fuse and the SRS fuse are the same fuse, so on those fun rewires.....be careful with your memory wire!!!!! Need any help, look up our store and gimme a call, my name is Tom.......

Posted By: IIrjII
Date Posted: January 26, 2004 at 1:07 AM

Thanks Tom. I work for store 188, Chula Vista Ca. I'll remember that though. I didn't know about the memory fuse and srs fuse. Is that all years of benz? Or just the newer/older ones? Thanks again.

Posted By: ccroadshop99031
Date Posted: January 26, 2004 at 8:24 AM

on the factory radio there is a wire that gets ground when the radio is in if u ground this wire the alarm should work fine oh ya power ant. is a clip on the back of the radio similar to a ground have fun

Posted By: IIrjII
Date Posted: January 26, 2004 at 7:54 PM

Thanks. Do you know which wire it is?

Posted By: ccroadshop99031
Date Posted: January 27, 2004 at 5:09 PM

not sure from what i remember it was in the same harness as the power wires if that helps