buzzer - if headlights left on

1976-1985: 230T, 230E, 230TE, 230CE, 280E, 280TE, 280CE, 240D, 300D, 300CD, 300TD,
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C Class
Posts: 28
Joined: Fri 06 Feb, 2015 8:31 am
Model you own: w123

buzzer - if headlights left on

Post by 280Ejim » Wed 01 Nov, 2017 10:15 pm

This 'lights left on' buzzer on my 1982 280E works - sometimes. The courtesy light comes on when opening the door, so this switch seems to be OK. If this is a common problem, and there is a fix, I'd be grateful for advice. The buzzer sound, when it works, appears to come from the vicinity of the instruments. Is it a simple thing to replace ? Thanks a lot for any help. jim

C 111
Posts: 927
Joined: Sat 25 Apr, 2009 9:32 am
Model you own: w123
Location: Melbourne, Vic

Re: buzzer - if headlights left on

Post by tsharkey » Wed 01 Nov, 2017 10:57 pm

The buzzer is on the back of the instrument cluster - square aluminium box, can't miss it, on the back Fuel, Oil and Temp circuit board which the cluster plug connects to as well. It relies on the key being out of the ignition *+ve applied, dash lights on +ve applied and door open -ve earth applied. I rely on it to prevent leaving the lights on during the day !
You probably don't have the seatbelt part.
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W123 1981 300TD - Family Kid mover
W202 1998 C250D Factory OM605A Turbo - Partner's daily driver
W123 1982 300CD Retro fitted OM617A Turbo - Mine
W123 1984 300TD 5 Speed Manual, to teach the kids how to drive
W123 1982 300TD Factory OM617A Turbo (Hans) - Project
W123 1985 230TE - Brother's
W123 1985 300D - Sister in Law's
1962 S-Series Valiant (Tho Daimler & Chrysler divorced, still part of the extended family)

Past benzes
W114 1969 250CE - PO put in an M110 transplant and nearly sent me around the bend
W123 1981 300TD - "Matilda" - RIP hit front side & rear but left my brother + niece A-OK

Current Projects
Coupe restoration, Turbo Wagon freshen up

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