W170 - 2003 SLK 230 - spurrious hazards flashing

GrahamDo

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Jun 1, 2004
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Location
Wiltshire, UK
Your Mercedes
W170 and W166
Hi everyone - started in the last week (following a few days of good old British rain, and then a very hot day or two).....I park up my W170 and lock it with the remote central locking and then after anywhere between 10 and 30 minutes, the hazards then start flashing rapidly. There's no horn alarm at the same time, so I'm assuming it's a short circuit somewhere but struggling to know where to start with this one. Other than this, and roof that is sometimes temperamental, she's been a reliable old girl.....anyone had anything similar?

Thx
 

Blobcat

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Feb 8, 2006
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Location
Grange Moor
Your Mercedes
R171 SLK280, Smart R451, Land Rover 110 County SW, 997 C2S, R1250 GSA TE 40th, CBR600FP
Have a look below the carpets in the boot for water ingress
 

alexanderfoti

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Tonbridge
Your Mercedes
W221 S65 AMG - W204 C63 AMG + Various other MB's
If it has a factory fit mb main dealer alarm, this would be the most likely culprit. Often located under the dash
 

grahamcol

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Jan 12, 2009
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West Midlands
Your Mercedes
2001 SLK230, 2007 CLK220 CDI
Yes, the factory alarm sirens tend to play up as the internal batteries age. Some just disconnect the siren but there might be insurance implications.
 

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