Did you ever figure this?
Alarm wont turn off after jumping 99 CLK320
Thread Starter
Newbie
Joined: Apr 2010
Posts: 2
Likes: 0
99 CLK320
Alarm wont turn off after jumping 99 CLK320
Hi all,
My car has been sitting for about 2 months and the battery was dead. When i went to go jump the car - the alarm siren would not shut off. What i had to do was pull the fuse out, but when i take the fuse out it also disables my power locks and power trunk. Does anybody know why the alarm wont turn off? and if in fact the siren fuse is connected to the power locks/trunk? thanks very much for the help.
My car has been sitting for about 2 months and the battery was dead. When i went to go jump the car - the alarm siren would not shut off. What i had to do was pull the fuse out, but when i take the fuse out it also disables my power locks and power trunk. Does anybody know why the alarm wont turn off? and if in fact the siren fuse is connected to the power locks/trunk? thanks very much for the help.
Junior Member
Joined: Apr 2005
Posts: 38
Likes: 0
From: FL
11 E550 Conv
only thing that comes to mind is maybe the battery is so low, that even after jumping, the voltage is making the alarm go off. sometimes low batteries can make veh do strange things....i've seen vehicles jumped and then the tach not work, or guages erratic while they're running. then a new battery and everything is back to normal.....hope it helps.
Senior Member
Joined: Jun 2006
Posts: 342
Likes: 2
only thing that comes to mind is maybe the battery is so low, that even after jumping, the voltage is making the alarm go off. sometimes low batteries can make veh do strange things....i've seen vehicles jumped and then the tach not work, or guages erratic while they're running. then a new battery and everything is back to normal.....hope it helps.
Also, if you lock then unlock (or vice versa) the car, it should turn off. This worked for me when I had to change my fuse for my rear dome light.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 1,258
Likes: 209
From: Boston North Shore
2001 CLK320 Cabrio
Actually, there is some science/logic this.
Even when your car is turned off, several critical components (e.g. obviously the alarm system being one), always remain connected to the battery. There are various sensor inputs to the alarm controller, connected through the CAN-Bus, which works via voltage encoding. The way voltage encoding works, is that electrical currents, flow to vehicle ground trough the various switches and or sensors. The voltage has different values, corresponding the circuit's current flow and/or resistance (e.g. OHM's law, where voltage = current x resistance). If the voltage level is incorrect, due to resistance (e.g. a faulty sensor or switch) or the battery condition, you will have a system error/malfunction.
Having let your battery run down, yet with still enough voltage remaining to keep the alarm controller active, may have triggered a faulty input sensor signal, which without a reset remains.
Disconnecting the battery's negative cable will remove 100% of the voltage to the vehicle and hopefully reset (i.e. erase) the condition triggering your alarm.
It's like chicken soup......it won't do any harm and may do some good.
Note: After removing the battery via disconnecting the negative cable, you'll have to reset the usual radio code, ABS/BAS warning and power windows, which is explained in your owner's manual.
Last edited by Serndipity; Nov 26, 2014 at 10:35 AM.
MBWorld Fanatic!
Joined: May 2007
Posts: 1,435
Likes: 0
From: Nebraska
99CLK320,
FWIW: put the fuse back in, hock up a battery charger to the cables in the trunk(or under the hood) at no more than 2 amps before you replace the old battery and and see what happens. When my original battery(99)finally went south after 15 years, which I think is pretty awesome, there was not enough juice to turn the car over but enough to light interior lights etc.,(and in your case run the alarm)so as long as you keep the ECU live you won't have to go through the whole reset hooie/procedure. FWIW
Last edited by dlbehrns; Nov 28, 2014 at 06:30 PM.
Trending Topics
Senior Member
Joined: Sep 2013
Posts: 260
Likes: 0
From: Pittsburgh, PA
W208 CLK55 AMG, W203 C32 AMG, W163 M Class Sport
Have you tried a trickle charger?
-Disconnect battery
-Inspect batter - pop off lid and check water levels. If applicable add water to marked level
-Re connect battery
-Connect trickle charger purchased at Harbor Freight etc
-If this works go through re-set procedure
If you have continued problems call MB usa for battery replacement.
MB offers free assistance as long as you own your car. I haven't used it recently. It used to have an amazing reputation but recently has been getting mixed reviews.
http://mercedes-benz.custhelp.com/app/call
-Disconnect battery
-Inspect batter - pop off lid and check water levels. If applicable add water to marked level
-Re connect battery
-Connect trickle charger purchased at Harbor Freight etc
-If this works go through re-set procedure
If you have continued problems call MB usa for battery replacement.
MB offers free assistance as long as you own your car. I haven't used it recently. It used to have an amazing reputation but recently has been getting mixed reviews.
http://mercedes-benz.custhelp.com/app/call
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Senior Member
Joined: Sep 2013
Posts: 260
Likes: 0
From: Pittsburgh, PA
W208 CLK55 AMG, W203 C32 AMG, W163 M Class Sport
Try calling 1-800-FOR-MERC and see what complimentary work they will do for you. http://www.starmercedes.com/roadside.htm
Try calling1-800-FOR-MERCEDESS
Try calling1-800-FOR-MERCEDESS
Last edited by beefstallionAMG; Nov 30, 2014 at 08:37 AM.
