SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: How to diable alarm..KEEP it from going on, not just turning off. or SILENCE IT.

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Old May 10, 2009 | 08:25 PM
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From: In a VAN down by the river
His wifes head hard into the headboard nightly!!
How to disable alarm..KEEP it from going on, not just turning off. or SILENCE IT.

i have searched but no good answers how to either:

A) silence alarm
B) de-activate so it wont arm when LOCKING doors.

thx

Last edited by VendettaMB; May 10, 2009 at 10:23 PM. Reason: i spell like an idiot!!
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Old May 11, 2009 | 12:59 AM
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Goes off by itself ? how about lights any of it goes on too ?
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Old May 11, 2009 | 01:27 AM
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From: In a VAN down by the river
His wifes head hard into the headboard nightly!!
Originally Posted by m4xm1l10n
Goes off by itself ? how about lights any of it goes on too ?
as soon as i lock doors, and walk away..i guess it takes 15sec. to activate them IT STARTS CHIRPn away..not all the time..never at home( i think as in underground in condo)..only 50% of the time in public..so random, then do it 3x or so then its ok.

can it be locked w/o alarm, or at least silent mode?..sensitivty adjusment?
i havent even looked to see if its the lights also, so quick to turn it off of embarassment.
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Old May 11, 2009 | 09:40 AM
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03 SL500
May be easier to track down what is causing the alarm to activate.
Could be a faulty door/trunk/hood switch or just them being out of adjustment.
If not those you may want to pay the $tealer/indy to do a diagnosis on the alarm system.
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Old May 11, 2009 | 11:32 AM
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From: In a VAN down by the river
His wifes head hard into the headboard nightly!!
Thx. That is a good suggestion. But until I have time I need to stop the noise and save my battery. Maybe I can pull a fuse. As it is I don't lock car when I park if it just goes off. You would think there is a way to make it silent, as so many people get towed with alarms that go off.

Also I have never seen a fault or anything saying alarm, or door, trunk. Which you would think would indicate that if enough to set off alarm, but it may be. I will double check. Thx for yr help
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Old May 11, 2009 | 05:12 PM
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'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
Originally Posted by VendettaMB
Maybe I can pull a fuse.
In the main fuse box you will see a row of fuses. Removing the 3rd fuse from the left should disable the alarm siren and nothing else. This is a 7.5-amp fuse.
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Old May 11, 2009 | 05:22 PM
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From: In a VAN down by the river
His wifes head hard into the headboard nightly!!
Originally Posted by bobterry99
In the main fuse box you will see a row of fuses. Removing the 3rd fuse from the left should disable the alarm siren and nothing else. This is a 7.5-amp fuse.
beautiful..i will give it a try. tried to go for lunch but it wouldnt stop. i went home and it did after 1 reset...so random. taking in thursday, but that will help on draining batt and annoying siren till then, thx
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Old Jul 26, 2009 | 03:25 PM
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From: In a VAN down by the river
His wifes head hard into the headboard nightly!!
Originally Posted by VendettaMB
beautiful..i will give it a try. tried to go for lunch but it wouldnt stop. i went home and it did after 1 reset...so random. taking in thursday, but that will help on draining batt and annoying siren till then, thx
replaced BOTH batteries With MB, had MB look at it..still drains my consumer batt everytime!!! AAAARRRRGGGGGHHHHH!!!!!!!!!
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Old Jul 26, 2009 | 03:30 PM
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From: In a VAN down by the river
His wifes head hard into the headboard nightly!!
flashes

Will the alarm when disabled FLASH certain amount of times to tell me it has gone off or why? what flashes mean what when arm/disarm.

thx

Last edited by VendettaMB; Jul 26, 2009 at 03:32 PM.
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Old Oct 15, 2009 | 08:46 PM
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From: In a VAN down by the river
His wifes head hard into the headboard nightly!!
Originally Posted by VendettaMB
replaced BOTH batteries With MB, had MB look at it..still drains my consumer batt everytime!!! AAAARRRRGGGGGHHHHH!!!!!!!!!
after 1 month i got my car back from MB dealer today..gave me keys and it was dead! so they tossed new battery in it(as i bought 2 new ones about 3 mo. ago)..so i will see what happens over next few days..OH now instantly my dash throws errors for low beams and they are off, then came back o after i restarted car, $4700+$$$ bill. i luv mercedes cars!
Jay at dealer was great. too bad the car isnt.

Last edited by VendettaMB; Oct 15, 2009 at 09:01 PM.
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Old Aug 28, 2010 | 04:13 PM
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From: Miami, Fl
08 ML350, 2011 E550 Cab
Ever figure out why the alarm was going off for no reason... After washing and detailing my car recently, i now have this problem. As soon as i lock the doors, it takes about 20 sec and the alarm will sound.
Its driving me crazy...
Thanks
Nick
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Old Sep 8, 2010 | 12:42 PM
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From: Miami, Fl
08 ML350, 2011 E550 Cab
Figured out the problem..

Here was the problem..
And solution

https://mbworld.org/forums/sl-class-...y-fix-diy.html
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Old Aug 11, 2013 | 01:52 AM
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Originally Posted by bobterry99
In the main fuse box you will see a row of fuses. Removing the 3rd fuse from the left should disable the alarm siren and nothing else. This is a 7.5-amp fuse.
Thats some ignorant *** **** in the third
Fuse from the left lol. Theres alot of rows dont post stupid **** give a fuse location.
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Old Jun 3, 2016 | 01:44 PM
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Originally Posted by erik oberdorf
Thats some ignorant *** **** in the third
Fuse from the left lol. Theres alot of rows dont post stupid **** give a fuse location.
The 3rd from the left (top left in this picture) is the power fuse for the siren (F25) (K40/2 F25)

Chris
Attached Thumbnails How to diable alarm..KEEP it from going on, not just turning off. or SILENCE IT.-r230-siren-fuse.jpg  
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Old Sep 14, 2016 | 08:30 PM
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From: Rosebud, VIC, Aus
ML 55 AMG
Alarm Randomly going off

Above your head whilst in the drivers seat is your trip/fuel display. To test if it is your sensitivity for "towaway or broken glass" simply press the right hand (Opp to reset) button until "off" is displayed. You must do this within 15 seconds of switching your engine off. Once "off" is displayed you can then go and lock your doors. If this works then you know it is the glass break sensor that needs replacing. Pain in the proverbial I know.
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Old Sep 14, 2016 | 11:24 PM
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There is no glass breakage sensor in the SL. There is a tow sensor, and it can be disabled by pressing the button located in the center console, below the gearshift lever.

One common problem with the ATA siren is that it dies. It's located under the fender liner, behind the front left wheel. Even with the liner in place, it can still get road salt and water in it that destroy it. Also, it has a built-in rechargeable battery that will eventually die and leak onto the circuitry.
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Old Sep 15, 2016 | 01:16 AM
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From: Rosebud, VIC, Aus
ML 55 AMG
Alarm problems

I was referring to the ML 55 AMG which has the sensor. Pain in the butt
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Old Sep 15, 2016 | 01:23 PM
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Rudeney: On R230 cars ... does the tow sensor button turn red to signal that it's active and that the tow alarm system is "on duty," or does it turn red to signal that the tow alarm is deactivated?
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Old Sep 15, 2016 | 08:31 PM
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Originally Posted by jonthebass
I was referring to the ML 55 AMG which has the sensor. Pain in the butt
Yes, I had an ML and remember issues with the glass breakage sensor. What year is yours? If it was built from April 2001 (so late MY2001 or MY2002), there was a known issue with the sensor and it needs to be replaced.
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Old Sep 15, 2016 | 08:33 PM
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Originally Posted by Heatwave
Rudeney: On R230 cars ... does the tow sensor button turn red to signal that it's active and that the tow alarm system is "on duty," or does it turn red to signal that the tow alarm is deactivated?
When you press the button, the red LED indicator illuminates and this means that the tow sensor is disabled. When the indicator LED is not illuminated, the sensor is enabled.
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Old May 12, 2017 | 07:30 PM
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SL500
sl500 siren fuse

Originally Posted by latemodel21
The 3rd from the left (top left in this picture) is the power fuse for the siren (F25) (K40/2 F25)

Chris
Thanks. Worked for me. I did not have to remove the siren, just the fuse, which was much easier. MB told me I needed a front SAM which was very costly, but removing the fuse fixed my problem and saved me lots of money. Now I can lock my doors with the smart key and no siren or flashing lights. Thanks again.
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Old Aug 10, 2017 | 02:24 AM
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Can anyone tell me if this worked or works?I hate the alarm.

Originally Posted by bobterry99
In the main fuse box you will see a row of fuses. Removing the 3rd fuse from the left should disable the alarm siren and nothing else. This is a 7.5-amp fuse.
Can anyone tell me if this worked or works?I hate the alarm.
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Old Jan 5, 2018 | 01:18 PM
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500 so Year 2000
Originally Posted by erik oberdorf
Thats some ignorant *** **** in the third
Fuse from the left lol. Theres alot of rows dont post stupid **** give a fuse location.
in the trunk the 15 fuse second from bottom is the alarm fuse. Pull out and it shuts it off. Will also make the phone(if you still have one connected in the car) beep for about 30 seconds when you start it or put key in but will then shut off.
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Old Jan 5, 2018 | 02:23 PM
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Cl500
Alarm

Originally Posted by kiwigirl
Can anyone tell me if this worked or works?I hate the alarm.
It worked. Thank God. NO Alarm
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Old Jun 30, 2018 | 08:55 PM
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Originally Posted by bobterry99
In the main fuse box you will see a row of fuses. Removing the 3rd fuse from the left should disable the alarm siren and nothing else. This is a 7.5-amp fuse.
I am trying to pull the fuse for my slk, but none of the fuses are named for the alarm, which one is it please?
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