SLK lamp failure warning light.

owenrich

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Your Mercedes
slk
Hi all, just a quickie. Warning light just appeared today, all outside lights working ok plus inside & boot. Any ideas please?
 
A

andy@pcd-ltd

Guest
If its the old shape slk these suffered with poor connection on the brake lights causing the warning light to come on. The only real repair is to replace the affected cluster. Unless someone else knows of a cure
 

television

Always remembered RIP
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Mar 14, 2005
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Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
If all of the lamps are working including the number plate lamps, then it could be a brake light bulb, so start the car up without touching the foot brake, then apply the foot brake,if the warning lamp comes on, then a brake lamp bulb faulty.

This has nothing to do with the inside or boot lamp,,if after the above it is still on, then clean all of the bulbs and holders
 

geoffd

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Sep 7, 2006
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Your Mercedes
56 plate SL 350 (sold)
SLK bulb failure light

Do you know if the indicators flash properly when the bulb failure light comes on ?

If they don't, and all the sidelight bulbs do work OK, then it's a fault with the bulb failure unit which is part of the main lighting switch.

I've seen this with two SLKs now and initially at least it's related to a bit of dampness causing incorrect resistances in the failure measuring circuits. The problem is more common in wet weather when the air is damp and or when condensation can form inside the car.

The cure unfortunately is a new light switch - ouch! But a temporary fix is to spray the back of the switch with aerosol switch cleaner. This works by displacing the dampness, but is not a permanent cure.

Geoff
 
J

jaybee5

Guest
I had the same (intermitent) prob it was a duff bulb holder on the rear cluster.
 

bear919

New Registration
Joined
Sep 1, 2021
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Your Mercedes
2000 R170 SLK200K
SLK bulb failure light

Do you know if the indicators flash properly when the bulb failure light comes on ?

If they don't, and all the sidelight bulbs do work OK, then it's a fault with the bulb failure unit which is part of the main lighting switch.

I've seen this with two SLKs now and initially at least it's related to a bit of dampness causing incorrect resistances in the failure measuring circuits. The problem is more common in wet weather when the air is damp and or when condensation can form inside the car.

The cure unfortunately is a new light switch - ouch! But a temporary fix is to spray the back of the switch with aerosol switch cleaner. This works by displacing the dampness, but is not a permanent cure.

Geoff
Hi, no idea if you guys are still here after 15 years, however I have a (new to me) 2000 R170 SLK200 Kompressor. Lots of work just done to it, but just heard from mechanic that the light fault is now on. They don’t know what the issue is. However, a few months ago the car went through an automatic car wash and as a result, there was some dampness in the cabin (and in the engine compartment, that’s another story). It seems all the lights are working (headlights, blinkers, rear lights and brake light) so do you have any other ideas? It seems that the regular OBD scan tools don’t work on this model? Thanks.
 


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