Alarm confused and desoriented w202

[poseidon]

Colleagues,

My door locks work perfectly well (vacuums etc) and also the immobiliser, however the alarm is becoming baffled frequently.

It comes off when I open the unlocked door, and then it takes time to switch it off by locking and unlocking the car several times. All the neighbours pop their heads at the windows by the time I switch it off.

In the last few days differnt problems have occured. The alarm would not arm when I lock the car. I lock the car with the fob key but the green light the in mirror starts flashing, whereas normally the red light would flash to indicate that the alarm is armed.

Does anyone understand what is hapenning?

Thanks in advance.
REgards,
Pose

 

[bigasotonuk]

Hi,
Try changing the fob batteries first before doing anything else

 

[brutus]

do both your green and red bulbs work because believe it or not it is the bulbs that send the signal to the alarm to tell it to arm or dissarm. the immobaliser is part of the car but the alarm was designed to be added on. it is true however that if your batteries are going flat that you could experience this problem mainly due to the red lights flashing extra times to tell you the key fob is sending a week signal.i have had first hand experiance with this. i changed batteries problem solved.

 

[television]

Was not there something of late where the siren was faulty

 

[bigasotonuk]

Hi,
As brutus says 'all the leds MUST work' or the alarm will give you problems and just because the fob operates the central locking, does,nt mean the batteries are ok.

 

[poseidon]

solved

Hi,

Thanks to all. I have put new batteries and it is working OK.

I eliminated batteries originally since:

1.) Manual says that both lights (red and green) should flash if abttery is low
2.) Door locks work OK. Only the allarm is confused.
3.) Batteries are only 2.5 years old.

I am glad it is sorted without much investment.
For information the new battery has around 3.16V whereas the flat ones around 3.02V.

REgards,

Pose

 

[mick777cpt]

I just posted a note about my W203

problem about 3 months ago, my alarm went of intermittenetly and the horn was silent. Apparently another mod. The Alarm horn is behind the pax side wheel arch liner, Remove the front wheel and liner and it sits behind there. Mine had a crack and was full of water! They have designed a new horn that stops this £65

 

[Legoman]

anyone know how easy it is to get a replacement alarm horn on my w124? , its the standard one (i think) but its melted due to the manifolds lol. bad placement imo.