SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: R230 Command Unit Replacement

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Old Apr 25, 2023 | 04:49 PM
  #1  
Ossidian's Avatar
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Mercedes Benz
R230 Command Unit Replacement

Looking to replace my defective 2009 SL550 command unit. Have access to used unit with VIN. Question - is there an Anti Theft i.e code requirement? Is there a work around?

Thanks!
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Old May 1, 2023 | 02:23 PM
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2008 Mercedes-Benz SL 550
2007 SL Owner Here

Originally Posted by Ossidian
Looking to replace my defective 2009 SL550 command unit. Have access to used unit with VIN. Question - is there an Anti Theft i.e code requirement? Is there a work around?

Thanks!

Hello:

I did not replace my head unit with another identical unit. I replaced it with an android after market brand.

I am unable to change the car time as this is handled by the head unit. My CD Changer and CD Trunk Navigation system are useless (will likely remove and sell them at some point - or save to have a complete original car).

But I didn't have any issues with the security system when I made the change. Just my 2 cents. Again an older model and I replaced with a after market product.

Cheers,
T
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Old May 2, 2023 | 10:40 PM
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2009 SL550
To set the time after you change your radio just pull the fuse for the instument cluster. Do it at 12:00 as it will reset to 12:00.
I think it is fuse f 21 or f 22 in the engine bay drivers side. Its a 5 amp fuse.
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Old May 2, 2023 | 10:59 PM
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2008 Mercedes-Benz SL 550
True, that works.

Good idea...

I don't have to rely on my mechanic for that.

T
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Old May 13, 2023 | 11:52 PM
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Mercedes Benz
Used command unit from 2009 SL550 Silver Arrow installed. No code needed! Works and plays fine.
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