Random Alarm sounding!

faraway_flossie · 16-07-2008, 08:08 AM

The last couple of nights the alarm (siren and indicators) has gone off on our V280 - the first at midnight, and then last night at 2am. Our neighbours are not impressed!

Can't see any obvious reason for why it would have sounded - and simply unlocking and relocking the car with the remote is enough to stop it.

Also - no work of any kind has been done on the car in the last 3 or 4 months...

Anyone got any ideas what might be causing this?

Thanks in advance!

Fiona

recycled · 16-07-2008, 08:11 AM

I thought spiders were a common thing.

rajinder_1 · 16-07-2008, 08:43 AM

It could be your Battery, if you have a slight drop in the charge your alarm can go off.

faraway_flossie · 16-07-2008, 08:56 AM

Battery was replaced about 5 months ago - so should be OK.

Spiders possible I guess - we did go to a PYO fruit farm on sunday and came back with lots of muddy fruit and veg!

grober · 16-07-2008, 09:10 AM

Quote:

Originally Posted by faraway_flossie

Battery was replaced about 5 months ago - so should be OK.

Spiders possible I guess - we did go to a PYO fruit farm on sunday and came back with lots of muddy fruit and veg!

QED sounds as if you brought back a few unwanted stowaways.

spongebob · 16-07-2008, 09:15 AM

!!

spongebob · 16-07-2008, 09:22 AM

Jus had a similar problem with my CLK 320, turned out to be my spongebob gonk hanging from the mirror upseting the interior motion sensors. Poor spongebob has now been banished to the glovebox !!!

SilverSaloon · 16-07-2008, 10:03 AM

is there an option on your alarm to switch off the motion sensor and only have the door opening function active? there was on my CLK. i had the same problem. never found the problem as it went away, so i guess it was a spider etc.

if you cant switch off the motion sensor then cover them up with insulation tape for a night to see if it still happens.

BlackC55 · 16-07-2008, 10:05 AM

The V-class alarm system is very poor and very difficult to diagnose. The most common causes are:

1. Door contact switches (on any door)
2. Drivers door lock micro switch
3. Broken wiring loom on drivers and passenger door apature
4. Faulty siren
5. spiders etc
6. control unit problem

nigel cross · 16-07-2008, 10:29 AM

Quote:

Originally Posted by spongebob

Jus had a similar problem with my CLK 320, turned out to be my spongebob gonk hanging from the mirror upseting the interior motion sensors. Poor spongebob has now been banished to the glovebox !!!

I'll have to report you to the RSPCS

Inkyskin · 16-07-2008, 10:41 AM

Quote:

Originally Posted by recycled

I thought spiders were a common thing.

I have this problem - solved it by turning off the interior detectors every time I leave the car. When I get round to getting it properly valeted I'm going to make a point of the critter getting cought, and promptly squished.

nullogik · 16-07-2008, 11:39 AM

In the past I've had a fly and a moth cause my alarm to go off for no apparent reason.

BTB 500 · 16-07-2008, 12:24 PM

Alarms are a right pain on older vehicles, the one on our Audi goes off fairly regularly even if the interior movement sensors are disabled. It's probably a slightly dodgy switch somewhere, but hard to trace.

faraway_flossie · 17-07-2008, 10:36 AM

We discovered the problem - DD had got out of the sliding door on Monday, and hadn't shut it properly - the contact wasn't quite contacting - if that makes sense!

Glad to say that i had a good night's sleep last night with No alarms sounding!

Thanks everyone for your answers!

16-07-2008, 08:08 AM	#1
faraway_flossie New Member Join Date: Jan 2006 Location: London Car: V280 Posts: 9	Random Alarm sounding! The last couple of nights the alarm (siren and indicators) has gone off on our V280 - the first at midnight, and then last night at 2am. Our neighbours are not impressed! Can't see any obvious reason for why it would have sounded - and simply unlocking and relocking the car with the remote is enough to stop it. Also - no work of any kind has been done on the car in the last 3 or 4 months... Anyone got any ideas what might be causing this? Thanks in advance! Fiona

16-07-2008, 08:11 AM	#2
recycled Hardcore MB Enthusiast Join Date: Feb 2007 Location: northwest/scouseland Car: porsche 911C4s /w202-c180sport Posts: 4,340	I thought spiders were a common thing. __________________ cars give out co2, plants swallow co2, drive your car more, feed the plants and save the planet

16-07-2008, 08:43 AM	#3
rajinder_1 Hardcore MB Enthusiast Join Date: Jan 2006 Location: Midlands Car: 01 Designo Mystic Blue SL320 & 96 Silver C Class Posts: 720	It could be your Battery, if you have a slight drop in the charge your alarm can go off. __________________ Mercedes~Benz through and through....

16-07-2008, 09:15 AM	#6
spongebob New Member Join Date: Jul 2008 Location: North Yorks Car: 1998 CLK 320 Sport Posts: 19	!! Last edited by spongebob; 16-07-2008 at 09:24 AM.

16-07-2008, 10:03 AM	#8
SilverSaloon Hardcore MB Enthusiast Join Date: Mar 2004 Location: Dunfermline, Fife, Scotland, UK Car: 1994 W124 E300D Estate, 1985 R107 280SL Posts: 5,500	is there an option on your alarm to switch off the motion sensor and only have the door opening function active? there was on my CLK. i had the same problem. never found the problem as it went away, so i guess it was a spider etc. if you cant switch off the motion sensor then cover them up with insulation tape for a night to see if it still happens. __________________ Mercedes E300D Multivalve W124 Estate (1994) - FULLY LOADED - MB-Tex, Electric Seats, Wood/Leather wheel, Alloys, Orthopedic Seat, Auto-Dim Mirror, Auto Climate Control, Fire Ext, Cruise Control Mercedes 280SL R107 (1985) - Signal Red, Pebble Leather, Cruise Control, Rear Seats, Headlamp Wash/Wipe, Rear Spoiler, Alloys, Hard & Soft Tops Alfa Romeo 156 2.5 V6 Veloce - Black, Tan Leather, all toys

16-07-2008, 08:56 AM	#4
faraway_flossie New Member Threadstarter Join Date: Jan 2006 Location: London Car: V280 Posts: 9	Battery was replaced about 5 months ago - so should be OK. Spiders possible I guess - we did go to a PYO fruit farm on sunday and came back with lots of muddy fruit and veg!

16-07-2008, 09:22 AM	#7
spongebob New Member Join Date: Jul 2008 Location: North Yorks Car: 1998 CLK 320 Sport Posts: 19	Jus had a similar problem with my CLK 320, turned out to be my spongebob gonk hanging from the mirror upseting the interior motion sensors. Poor spongebob has now been banished to the glovebox !!!

16-07-2008, 10:05 AM	#9
BlackC55 Hardcore MB Enthusiast Join Date: Feb 2007 Location: Horndean, Portsmouth, Hampshire Car: E280 on 19's. Smart ForTwo. Mk1 Golf cab. Mk1 Caddy fully restored. Land Rover Defender 7.5T truck.. Posts: 7,137	The V-class alarm system is very poor and very difficult to diagnose. The most common causes are: 1. Door contact switches (on any door) 2. Drivers door lock micro switch 3. Broken wiring loom on drivers and passenger door apature 4. Faulty siren 5. spiders etc 6. control unit problem __________________ Prestige car Service: I am listed here on MBClub please click to see services and discounts available.

16-07-2008, 11:39 AM	#12
nullogik Hardcore MB Enthusiast Join Date: Apr 2008 Posts: 209	In the past I've had a fly and a moth cause my alarm to go off for no apparent reason.

16-07-2008, 12:24 PM	#13
BTB 500 Hardcore MB Enthusiast Join Date: Aug 2005 Location: Bracknell, Berks Car: '97 R129 SL500, '07 Vito 120 Dualiner Long, '96 Audi A4 TDi 110 SE Avant Posts: 9,551	Alarms are a right pain on older vehicles, the one on our Audi goes off fairly regularly even if the interior movement sensors are disabled. It's probably a slightly dodgy switch somewhere, but hard to trace. __________________ . *Bill* click images for gallery pics SL500 - Brilliant Silver, AMG exhaust, AMG split-rims Vito 120 Dualiner Long - Jasper Blue, 204 bhp, 440 Nm, de-badged .

17-07-2008, 10:36 AM	#14
faraway_flossie New Member Threadstarter Join Date: Jan 2006 Location: London Car: V280 Posts: 9	We discovered the problem - DD had got out of the sliding door on Monday, and hadn't shut it properly - the contact wasn't quite contacting - if that makes sense! Glad to say that i had a good night's sleep last night with No alarms sounding! Thanks everyone for your answers!

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