The security alarm on my 2000 CLK 320 Mercedes Benz goes off for no reason, sometimes even when I'm driving.

Battery Disconnect or Replacement Problems

Have the dealer scan the system for a defective door ajar sensor.

Car battery might be discharged , or try key lock unlock to calibrate key, hope this helps good luck.

When I try to start my merc clk 2003 the horn blasts but has been fine all day. Any suggestions?

try asking here

www.ukbookshelf.co.uk

trunk key locked in trunk

plug a jump pack in to the cig lighter should do it

i have a 2000 clk320. it would not start sometimes, the engine would crank but it wont start. but after an hour or so it would start. sometime i'll get somewhere park, and come out an hour later and the engine would not start. if your having the same problem, take it to autoparts store ex: autozone or kragen. they could check your battery for free. and if its not the battery. than it could either be your fuel pump. or the crank position sensor. good luck. hopefully this help.

HELLO. IT SOUND'S LIKE YOU COULD HAVE A BAD RADIATOR FAN SENCER.!!! THAT NEED'S TO BE CHANGED.!!! IT WHAT CONTROL'S THE RADIATOR FAN.!!!THAT TURN'S IT ON & OFF.!!!"GOOD LUCK"

I changed my key and the problem disappeared. I think there may have been an electrical short in the key electronics. I'm happy again :o)