Need some help with a "warning" message
Thread Starter
Newbie
Joined: Sep 2010
Posts: 11
Likes: 1
From: Collegeville, PA
2009 C-300 Sport 4Matic Arctic White; 1998 Corvette Roadster, Black 6spd
Need some help with a "warning" message
I have a 2009 C300 4matic and within the last week I've been getting the "Check Right Tail Lamp and Brake Light" message. The right tail lamp, turn signal and brake lamps all work fine. Pressing the OK button on the steering wheel only clears this message while the car continues to run. Once you shut it off and restart the car the message reappears. Is there a way for me to clear this warning message out of the computer so that It isn't reappearing every time I start the car?? 
MBWorld Fanatic!
Joined: Aug 2004
Posts: 1,367
Likes: 3
From: MA
'24 Porsche Macan
I have a 2009 C300 4matic and within the last week I've been getting the "Check Right Tail Lamp and Brake Light" message. The right tail lamp, turn signal and brake lamps all work fine. Pressing the OK button on the steering wheel only clears this message while the car continues to run. Once you shut it off and restart the car the message reappears. Is there a way for me to clear this warning message out of the computer so that It isn't reappearing every time I start the car??
MBWorld Fanatic!
Joined: Sep 2009
Posts: 2,108
Likes: 7
From: Dix Hills, New York
2012 C250 Coupe
Do you have the LED brake lamps?
Also, are you sure that every bulb is working on the car. Maybe there are 2 brake lights. Compare the left and right brake patterns to make sure they match.
If you do have the LED package, it could be that you only have a couple of individual LED that have gone bad and it is throwing an error code.
Also, are you sure that every bulb is working on the car. Maybe there are 2 brake lights. Compare the left and right brake patterns to make sure they match.
If you do have the LED package, it could be that you only have a couple of individual LED that have gone bad and it is throwing an error code.
Junior Member
Joined: Dec 2007
Posts: 63
Likes: 0
From: Toronto, Ontario
C300 Sport 6-spd
You may have a defective wiring harness. This is a known problem that can be easily fixed by your dealer.
https://mbworld.org/forums/c-class-w...rake-lamp.html
https://mbworld.org/forums/c-class-w...rake-lamp.html
MBWorld Fanatic!
Joined: Apr 2008
Posts: 1,167
Likes: 11
From: The Netherlands - ROTTERDAM
W205 C400
Good luck i see this thread. Recently i had the same problem. My car was running and i saw my rear lights where flickering. So i looked at it and the connector was burned. i'm glad its a known problem. Im out of MB warranty but i have a dealer extended warranty so i hope they cover it.
Thanks Earlybird for the link!!
Thanks Earlybird for the link!!
Newbie
Joined: Jun 2007
Posts: 9
Likes: 0
From: Oahu Hawaii
2017 SLC43 AMG, 2016 GLC, 2011 C300 Sports Sedan
I just installed LED tails on my car and I get the same error message to "Check Tail/Brake lights". All light bulb and LEDs work perfectly. Any suggestions? I saw someone post something about a resister, but what type and where would it be installed/Soldered>?
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MBWorld Fanatic!
Joined: Apr 2008
Posts: 1,167
Likes: 11
From: The Netherlands - ROTTERDAM
W205 C400
Thats why i keep away from that kind of aftermaket stuff.
If you have oem, check the connectors, and try to start your car again, so the canbus re-check them.
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Newbie
Joined: Dec 2009
Posts: 10
Likes: 0
1999 E320
I have a same problem too, it say check on right side brake lamp but actualy my left side is bad so I bring my car to dealer to up grade software for free. Make sure you check the left side first. I have 2008 c300
