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2008 C200 rear left indicator and rear right brake light stays on

Old May 17, 2012 | 08:51 AM
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Mercedes C200 Kompressor 2008
2008 C200 rear left indicator and rear right brake light stays on

Dear MB Experts,

I am having a strage issue since this morning, I had a warning in the meter console for right turn signal not working but when I switched of my car, the left indicator stays on and also the right brake lights.. Any suggestions what went wrong and whats the problem.. HOw to have it resolved please advise. Thanks.
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Old May 18, 2012 | 03:44 AM
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Mercedes C200 Kompressor 2008
Anyone please help
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Old May 18, 2012 | 04:18 AM
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Unplug the battery and see what happens? I'm at a loss and I assume most people are as well, which is why no one is responding. Best advise: take it to the dealer or Indy
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Old May 18, 2012 | 05:31 AM
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It's likely a rear SAM issue. For CANbus & SAM issues you really need to get the car onto a Star diagnostic machine. SAM might just need re programming.
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Old May 18, 2012 | 06:12 AM
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Mercedes C200 Kompressor 2008
Thanks for you response Glyn..

Took the car to workshop and the guy says your Fuse box which is in the trunk part # 2045453901, is blown and you need to replace it..

Is it something to believe or he is trying to rip me off.
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Old May 18, 2012 | 06:57 AM
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He is talking about the rear SAM - Signal Aquisition & Actuation Module. (includes fuses)

These things are expensive. It might be blown but it might also just be corrupted. First step is to re-program & initiate. If that fails then replace which also requires programming with Star.
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Old Dec 28, 2013 | 05:27 AM
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C200 Kompressor
ThePD,

It seems I'm having the same problem. Can you give me an insight on how you resolved this issue?
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Old Mar 24, 2014 | 01:16 AM
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2008 C200 Kompressor
Originally Posted by Glyn M Ruck
It's likely a rear SAM issue. For CANbus & SAM issues you really need to get the car onto a Star diagnostic machine. SAM might just need re programming.
I don't think so,I check the tail light,the wire does't connect to the rear SAM,so I think it does't matter with rear SAM.
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Old Mar 24, 2014 | 01:22 AM
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Originally Posted by Domm
Unplug the battery and see what happens? I'm at a loss and I assume most people are as well, which is why no one is responding. Best advise: take it to the dealer or Indy
I will try this tonight.I hope it works.
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Old Mar 24, 2014 | 06:46 AM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Originally Posted by hollysway
I don't think so,I check the tail light,the wire does't connect to the rear SAM,so I think it does't matter with rear SAM.
The brake light connects to the front SAM via fuse 21. The rest of the tail light cluster including flashers is controlled by the rear SAM.
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Old Mar 24, 2014 | 07:49 AM
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Originally Posted by Glyn M Ruck
The brake light connects to the front SAM via fuse 21. The rest of the tail light cluster including flashers is controlled by the rear SAM.
Are you check wire by yourself, or you have a circuit diagram ?

I don't see tail light cluster connect to the rear SAM directly.The wire and what you say confuse me.
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Old Mar 24, 2014 | 08:29 AM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Please note that anything that is labeled "electronic" on your fuse diagram is controlled by the front or rear SAM. The SAM is controlled over the CanBus which is a bi directional digital network that replaces miles of hard wiring. example. If you turn on your parking lights or headlights a signal is sent over the CanBus to the SAM to tell it to turn on your lights.

See the W203 Wiki for how a CanBus operates.
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Old Mar 24, 2014 | 08:33 AM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Here from Wiki.

You have no wiring diagram as you are used to because a Canbus carries multiple signals in multiple directions simultaneously if necessary.

http://static.ibsrv.net/mbworld/Can%...2010-28-02.pdf
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Old Mar 24, 2014 | 08:50 AM
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2008 C200 Kompressor
Originally Posted by Glyn M Ruck
Here from Wiki.

You have no wiring diagram as you are used to because a Canbus carries multiple signals in multiple directions simultaneously if necessary.

http://static.ibsrv.net/mbworld/Can%...2010-28-02.pdf
Thank you! I will read that information about Canbus.
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Old Mar 24, 2014 | 10:16 AM
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Originally Posted by ThePD
Thanks for you response Glyn..

Took the car to workshop and the guy says your Fuse box which is in the trunk part # 2045453901, is blown and you need to replace it..

Is it something to believe or he is trying to rip me off.
http://www.ebay.com/itm/321356100060

There you go, if all else fails.


That is $225 plus free shipping. Dealer price is $500+
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Old Mar 25, 2014 | 04:31 AM
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2008 C200 Kompressor
Originally Posted by Glyn M Ruck
Here from Wiki.

You have no wiring diagram as you are used to because a Canbus carries multiple signals in multiple directions simultaneously if necessary.

http://static.ibsrv.net/mbworld/Can%...2010-28-02.pdf
Do you have more detail about W204 rear SAM ? I will try repair the unit this weekend.
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Old Mar 25, 2014 | 06:45 AM
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Sorry, No.

You really need a Star to work on the SAM. Sometimes it's just the software flash that has become corrupted.

Last edited by Glyn M Ruck; Mar 25, 2014 at 06:48 AM.
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Old Mar 27, 2014 | 02:27 AM
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Originally Posted by Glyn M Ruck
Sorry, No.

You really need a Star to work on the SAM. Sometimes it's just the software flash that has become corrupted.
Thanks again.

I see the thread about "DIY: REAR SAM low cost repairing", and I'll try to reset rear SAM.If that not work,I'll find a used rear SAM or goto a Star like you said.
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Old Dec 31, 2014 | 01:25 AM
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2008 C200 Kompressor
About three weeks ago,my car definite crash.After locked the car,the rear light was always on.It must repair.I got to used market,changed rear sam,cost about $400,and the problem was gone.

When I have time,I will see the thread "DIY: REAR SAM low cost repairing" again, and I'll try to repair rear SAM.
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