alarm keeps going off for no reason

Asked by Jun 26, 2013 at 10:35 AM about the 1999 Mercedes-Benz SLK-Class SLK 230 Sport Supercharged

Question type: Maintenance & Repair

Hi,
My alarm will go off for no reason and the lights will keep blinking. What could be the
cause of this??  I did pull out the fuse till I save the money to take to dealer. Any
suggestions?
Thanks :):)

6 Answers

310

Had this problem on my '98 SLK230. Check the PSE unit in the trunk, passenger side, towards front, behind CD-player. Fairly easy to get to ... just pull the trunk bottom panel out so you can see the spare tire, then it's a few clips I think to get the panel off. You'll see yellow foam insulation around the PSE. Chances are, water has leaked in via the hose, and is INSIDE the PSE module. Wiggle it around to see if water comes out of the corner ... if a lot of water has come out and you've had this problem for a while, like I did, many of the parts in the PSE are rusted and you'll have to replace it ... about 500 to 600 bucks I think for a new one. Good news is, you can disconnect all of the hoses, and the alarm issue will go away. Bad news is, you will lose central locking (including gas access, so you'll have to get that sorted out), alarm, and I think one other thing but non-essential to driving the vehicle.

12 out of 12 people think this is helpful.
Best Answer
310

Rusted PSE

7 out of 7 people think this is helpful.
310

Rusted PSE

6 out of 6 people think this is helpful.
310

If you don't know how to, have a dealer or indie and set the gas access door to permanent unlock until you can get a new PSE.

2 out of 2 people think this is helpful.
Best Answer

Richard THANK YOU SOOOO MUCH FOR ANSWERING. I greatly appreciate it. Dode :):):)

90

Hi my mercedes 53 plate lifts keep flashing and now the alarm just goes off it's doesn't do it all the time just goes off randomly the alarm makes a screeching noise then the alarm goes off please can you help

9 out of 9 people think this is helpful.

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