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  #1  
Old 09-05-2006, 07:02 PM
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Join Date: Feb 2001
Posts: 171
1990 560SEL Aftermarket Alarm Install

Hi everyone:

I'm trying to figure out how to install an aftermarket alarm in a 1990 560sel. My main objective in this little project is to add the convenience of remote door lock/unlock for this vehicle. As i understand it mercedes uses some type of vacuum-actuated door lock/ unlock mechanism. Not sure if such device will be troublesome for an aftermarket alarm.

I have not purchased any alarm yet. Did a quick search on ebay and there's many cheap and generic brand alarms that costs little over $20. Not sure if these cheap alarms will be compatible with my car. So i'm still looking...

Please feel free to share your past alarm installation experience.

Thanks!

Mars

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  #2  
Old 09-05-2006, 07:39 PM
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Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
I ran across this thread when researching adding an alarm to my 93 190E 2.6...well i did but i cant seem to locate it now...but i did find this for you about wiring up vacuum locks to your keyless...i belive you use this *if* your keyless does not have onboard relays...if yours does then just splice into the wires

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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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  #3  
Old 09-05-2006, 08:40 PM
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Join Date: Feb 2001
Posts: 171
Hi JamesDean. Thanks so much for the picture. I don't see any doorlock button on the dashboard, so i guess there's no onboard relay. Is it correct to assume that i should connect the positive from the alarm box to the red fused 12V+ and then the negative from the alarm box to the green 30 from the driver dook lock? I'm just experimenting as i go along here since i haven't purchase the alarm unit yet.
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  #4  
Old 09-05-2006, 11:27 PM
JamesDean's Avatar
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
what kind of alarm are you buying?

I know when I bought my DEI keyless ($60) from circuit city it had onboard relays for locking/unlocking the doors I had to purchase additional relays for the horn / lights...

This is the wiring for my keyless "Valet Model 712T"

Due to the fact that my 300SD is a 1st gen w126 and only had 1 key hole that would unlock the entire car I had to add a 12v actuator. If I didnt I would only be able to remotely unlock the 3 doors/trunk/gas tank.

In a 2nd gen w126 this shouldnt be needed. One could just wire it up to the vacuum pump. danwatt over at BenzWorld.org did this, its what inspired me to do mine but I discovered that I needed the actuator.

I also plan on installing some kind of alarm/keyless in my 93' 190E...I also plan on installing a independant killswitch. I think that is the best deterrent of theft. My friend wants me to put in a killswitch system (consisting of 2 switches that are hidden and one push button that must be held in order to start the car).

oh, ha i seem to have BS'd a bit, here is that pic:
(its rather huge so I've just linked to it instead)

http://i98.photobucket.com/albums/l250/MafiaNicky/64cf673d.jpg

lemme see if I can remember what I did:
i think it was something like this diagram..i belive the colors matched...



you might have to do somthing along these lines:



i'd say just experiment outside the car and get it working before you go attacking the german wires! lol

Kris

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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