SL55 AMG, SL63 AMG, SL65 AMG (R230) 2002 - 2011 (2003 US for SL55 and 2004 for the SL65)

SL55/63/65/R230 AMG: ODD WARNING LIGHT!

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Old Jan 22, 2019 | 12:19 AM
  #1  
Ingenere's Avatar
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2003 SL55 AMG, 1989 348 Challenge, 1987 Testarossa, 1992 F40, 1989 Mondial t cab, 2001 X5 4.4 Sport
ODD WARNING LIGHT!

I have had my '03 SL55 since new and it has been great, with very few issues. This one is a stumper...

A couple of years ago I began getting a white BRAKE warning in the cluster. My dealer informed me that part of the Sensotronic brake system needed to be replaced. I know about the tool that resets this thing, but I opted to replace it. The dealer replaced it and I was good to go. However, the warning would periodically come up. Since there never had been a decrease in braking ability, I just lived with it...... until now.

I had to bring it in for another reason and informed them that the warning light that was supposed to be fixed when they replaced the brake part previously had never went away. My advisor said they would figure it out. Well, it's been 2 weeks and the techs can't find any braking issues, nor can they figure out how to get rid of the warning, nor what may be causing it.

If there are any techs on here that may have an idea, I would greatly appreciate it. Thanks in advance.
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Old Jan 27, 2019 | 04:08 PM
  #2  
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Aston Martin Vantage, GLE 43 AMG, Volvo XC60, BMW X1 35i, Ram 1500, BMW Z4 35i
Originally Posted by Ingenere
I have had my '03 SL55 since new and it has been great, with very few issues. This one is a stumper...

A couple of years ago I began getting a white BRAKE warning in the cluster. My dealer informed me that part of the Sensotronic brake system needed to be replaced. I know about the tool that resets this thing, but I opted to replace it. The dealer replaced it and I was good to go. However, the warning would periodically come up. Since there never had been a decrease in braking ability, I just lived with it...... until now.

I had to bring it in for another reason and informed them that the warning light that was supposed to be fixed when they replaced the brake part previously had never went away. My advisor said they would figure it out. Well, it's been 2 weeks and the techs can't find any braking issues, nor can they figure out how to get rid of the warning, nor what may be causing it.

If there are any techs on here that may have an idea, I would greatly appreciate it. Thanks in advance.
likely a service life issue...

see this link if you think it works for you

www.pistonheads.com/gassing/topic.asp?h=0&f=96&t=1659705
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Old Jan 27, 2019 | 04:41 PM
  #3  
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2003 SL55 AMG, 1989 348 Challenge, 1987 Testarossa, 1992 F40, 1989 Mondial t cab, 2001 X5 4.4 Sport
Originally Posted by whitewagon
likely a service life issue...

see this link if you think it works for you

http://www.pistonheads.com/gassing/t...f=96&t=1659705
I know the part you are thinking of and it was replaced, but the light never went away.
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Old Jan 28, 2019 | 02:09 PM
  #4  
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What does star say?

I know this may be dull but ill throw it out htere, but what if you just got some bulb or burn out in your cluster and the light stayed on
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Old Jan 29, 2019 | 01:29 AM
  #5  
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2003 SL55 AMG, 1989 348 Challenge, 1987 Testarossa, 1992 F40, 1989 Mondial t cab, 2001 X5 4.4 Sport
It turned out to be the electronic ignition switch that was the problem. It ties together the car's ability to shift out of park as well as that odd brake warning.

When I picked the car up today, my advisor informed me that MB was now warranting the SBC pump that I did 2 years ago (that was what we thought caused the warning back then), and they are going to issue me a full refund on that service! Parts and labor!
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