M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Brake lights out

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Old Oct 15, 2007 | 11:50 PM
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alewifebp's Avatar
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2014 BMW 550i
Brake lights out

OK, not all of them, and maybe not out at all. A couple of weeks ago after I left the car for a couple of days, I got the warning that the brake lamps were out, both right and left, and that the substitute bulb was on. I just figured it was an electrical thing with the car being left for a while and probably just less than usual power going to the lights, causing the message to appear. It disappeared after about 2-3 drives.

Since Friday, every start I'm getting the message, even though it looks fine. I took it to the dealer expecting that they would be able to easily replace any burnt out bulbs, but they tell me that I need to leave it with them for some time. Made an appointment for Friday, so we'll see what happens.

Anyone else have this? I would highly doubt that BOTH bulbs would malfunction, so I think it is some sort of electrical problem.
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Old Oct 16, 2007 | 10:56 AM
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2010 ML550, 2010 E350 4M, 1966 Corvette Convt C2
Originally Posted by alewifebp
OK, not all of them, and maybe not out at all. A couple of weeks ago after I left the car for a couple of days, I got the warning that the brake lamps were out, both right and left, and that the substitute bulb was on. I just figured it was an electrical thing with the car being left for a while and probably just less than usual power going to the lights, causing the message to appear. It disappeared after about 2-3 drives.

Since Friday, every start I'm getting the message, even though it looks fine. I took it to the dealer expecting that they would be able to easily replace any burnt out bulbs, but they tell me that I need to leave it with them for some time. Made an appointment for Friday, so we'll see what happens.

Anyone else have this? I would highly doubt that BOTH bulbs would malfunction, so I think it is some sort of electrical problem.
Most likely not the bulbs but the system is sensing some sort of an abnormality. Could be a bad connection somewhere causing high resistance. Could even be the brake light switch even though there does not seem to be a problem with these on the W164 like some earlier ML's.
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Old Oct 23, 2007 | 10:48 PM
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From: Northern NJ
2014 BMW 550i
I got it back from the dealer. Looks like they replaced the entire light assemblies, and the problem has been fixed.
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