Updated 2010 w221 taillights on older w221
The cost may be worth your time though, for myself I like to tinker with things and diy whatever I can so it's a learning experience that I enjoy.
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I know how to replace the light units but not how to get it work. Some say you need wire changes and some say you need new sam. How can I get it work simply by myself. Can someone tell me step by step maybe with pictures how to get it working.
The wiring is required if you keep the old rear SAM.
The wiring is required if you keep the old rear SAM.

Can somebody right it down how to rewire it maybe with some pictures.
The wiring is required if you keep the old rear SAM.
Hey Serge. Can you disconect a plug which goes to taillight and count a wires in this plug if you don't mind? I believe '10 model has 1 extra wire.
SAM replacement didn't work for jtanoyo1 he ended up with a rewiring. Any idea why?
-Joko
Hey Serge. Can you disconect a plug which goes to taillight and count a wires in this plug if you don't mind? I believe '10 model has 1 extra wire.
SAM replacement didn't work for jtanoyo1 he ended up with a rewiring. Any idea why?
Here is the deal - it's impossible for the harness in 2010 to have an extra wire, whoever told you that is wrong - the 2010 lights have exactly the same number of pins as the 2006-09 lights (total of 6). I can see how someone might have assumed that looking at the harness, because there is an extra empty pin slot, but it does not align to any pin on the 2010 lights. Some lights showing 6 wires on the harness mapping correctly to 6 pins in the 2010 lights are attached.
Now when you are describing the "top half dimmer row problem", are you getting the problem on running lights or the brake? I had that problem originally with the old SAM, but with the new rear SAM - the top and bottom rows are lit up with exact same intensity. See attached pics. The only difference I see is when I apply the brake - only the bottom row light up with greater intensity in concert with the brake light in the rear window...
Has anyone seen a 2010 S with brake applied? Is it only the bottom row that's lit up? That's my understanding...
Hey Serge. Can you disconect a plug which goes to taillight and count a wires in this plug if you don't mind? I believe '10 model has 1 extra wire.
SAM replacement didn't work for jtanoyo1 he ended up with a rewiring. Any idea why?
Last edited by jagata; May 4, 2010 at 07:36 PM.


