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Old 06-29-2009, 07:42 PM   #1 (permalink)
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SLK230 Brake light Failure

Hey all,

I have a 2001 SLK 230 and have a failed left side brake light and corresponding fault light on the dash.

FIXED THANKS ALL!

Last edited by Slick SLK; 06-30-2009 at 08:46 PM. Reason: Problem resolved
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Old 06-29-2009, 08:57 PM   #2 (permalink)
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Have you had the recall tail light assy replaced? See sticky thread at top.
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Old 06-29-2009, 09:02 PM   #3 (permalink)
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Originally Posted by Chris A View Post
Have you had the recall tail light assy replaced? See sticky thread at top.
I read through that sticky, I dont think it applies to Australian delivered cars, certainly I have not heard of this recall from Mercedes.

Regardless though the taillight assembly seems to be functioning fine, I think the fault is in the wiring not the tail light itself.
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Old 06-30-2009, 03:29 AM   #4 (permalink)
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Have a look at your license plate light that bulb may be out.
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Old 06-30-2009, 06:07 AM   #5 (permalink)
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Originally Posted by Slick SLK View Post
I read through that sticky, I dont think it applies to Australian delivered cars, certainly I have not heard of this recall from Mercedes.

Regardless though the taillight assembly seems to be functioning fine, I think the fault is in the wiring not the tail light itself.
That's the problem, they all LOOKED like they were OK, when in fact they were not.
The primary problem was with the contact points in the sockets, try replacing them with the newer black sockets as opposed to the old blue-green ones. Clean off the circuit strips with a pencil eraser first then add some transister heat transfer grease before you put the new socket in place.
that should help.
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Old 06-30-2009, 07:19 AM   #6 (permalink)
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Quote:
Originally Posted by Slick SLK View Post
I read through that sticky, I dont think it applies to Australian delivered cars, certainly I have not heard of this recall from Mercedes.

Regardless though the taillight assembly seems to be functioning fine, I think the fault is in the wiring not the tail light itself.
Recall doesn't apply in Oz
Bruce is correct - the problem is pitting in the contact rails and socket contacts and gives intermittent stop light operation. The dash light comes on and stays on if the stop light is even momentarily out of action.
The problem... http://www.benzworld.org/forums/2877786-post194.html

I have tried several solutions.
1. Initial solution - Mercedes SLK230 Stop Lights
2. Similar http://www.benzworld.org/forums/2002150-post5.html
3. Another http://www.benzworld.org/forums/r170...-long-8-a.html
4. DIY socket rewire http://www.benzworld.org/forums/2017732-post69.html
5. Use a Narva socket and wire to the power rails http://www.benzworld.org/forums/2580666-post4.html
6. I ultimately replaced the tail light assemblies with the LED ones from Taiwan - no problems since.
http://www.benzworld.org/forums/r170...ights-yet.html
My modded Merc tail light assemblies and OEM headlights live in boxes in the garage and I use Chinese lanterns.

PS. Put details of your SLK model and location on your avatar on the left so we knwo how best to identify the variant of SLK to respond to questions.
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Last edited by oztds; 06-30-2009 at 07:25 AM.
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Old 06-30-2009, 03:28 PM   #7 (permalink)
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I'll have a play with some of the solutions you good folks posted.

What concerns me though is that there is not even 12 volts coming from the harness to the left hand tail light itself when the brake is applied. There is on the right side.

I think it will require a trip to Mercedes, beauty of it now is that if they tell me the tail light assembly is faulty and needs replacing, I have some options to modify courtesy of this site and oztds. Thanks guys!
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Old 06-30-2009, 06:59 PM   #8 (permalink)
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Ok one more thought then....

If the ecu has detected a fault with the left hand brake light, does it stop the signal (voltage) going to that light until the ecu is reset (say at the dealer)? This in my mind at least would explain why the light is not working at all and there is no voltage to the light at all.

its just a bit strange, the car has only done 15000 km's so I would assume the pitting or damage to the circuit in the tail light would take some time to occur?
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Old 06-30-2009, 07:12 PM   #9 (permalink)
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Quote:
Originally Posted by Slick SLK View Post
Ok one more thought then....

If the ecu has detected a fault with the left hand brake light, does it stop the signal (voltage) going to that light until the ecu is reset (say at the dealer)? This in my mind at least would explain why the light is not working at all and there is no voltage to the light at all.

its just a bit strange, the car has only done 15000 km's so I would assume the pitting or damage to the circuit in the tail light would take some time to occur?
Sorry didnt see where you are located. Brake lights are often on a common circuit. If you have power to your right stop light you should have power to your left and center. A short would blow a fuse so that leaves you with a bad wire to the bulb or bad tail light assy. I have never followed the wires though in this car but I have in others. The ECU Im sure has nothing to do with that as my bulb out light came on once a week until i got my tail lights replaced. never had to reset it just jiggle the bulb.
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Old 06-30-2009, 08:46 PM   #10 (permalink)
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All sorted

Ok guys ignore my dribble.

I was looking at the wrong bulb / connector

Yes its the bulb holder, its been shorting

Fixed based on the pics in the link oztds provided.

Thanks again and sorry to be confusing.



Question is why MB Australia is not recalling these
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