S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

rear sam

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Old May 25, 2025 | 04:05 PM
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texasplayer's Avatar
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rear sam

Looks like rear sam got wet. So need to replace it. Will replacement need to be programmed?


Also - my module has the number A0285458132 on it.

from researching It seems I can use any of the Rear SAM numbers A0205451932, A0315451632, A0325458432?
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Old May 28, 2025 | 10:46 AM
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after all these years, everyone always says and knows the rear sams are ok to replace without "programming"

...and i tested it this weekend. and it works

looks harder than it is to re wire it just one strand at a time

my car does not die overnight anymore. mine was dry
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Old Sep 9, 2025 | 10:08 PM
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GL 550
Originally Posted by e350forme
after all these years, everyone always says and knows the rear sams are ok to replace without "programming"

...and i tested it this weekend. and it works

looks harder than it is to re wire it just one strand at a time

my car does not die overnight anymore. mine was dry
Did you have a problem finding the right one with matching part number? I’m stuck not being able to find anything. Does your MB start every time now?
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Old Sep 10, 2025 | 10:47 AM
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this is for a very specific year of s class, are you sure you have the right part of forum

w220 is where you landed so 1998-2005

anyway, the part number is clear to see even without removing the module fully. same procedure for any model though.... locate the right module, take a picture, post here if needed, parts are plentiful these are not rare birds at all . if you have a GL that forum will have to help you, maybe its a common issue maybe not right. dont let it stress either. this most likely will be more difficult to work on a GL than an old S, no reason you cant figure it out these days with AI, free diagnosis from shops or dealer, forum posts, insta ect....... if you really cant drive whatever benz you have, there are many ways the forum can help you track down whats up, assuming you have a spare car in the meantime (hopefully another half working benz)

there are other "intermittent start" situations but this was just a draining battery from a bad sam until it was jumped ect



Last edited by e350forme; Sep 10, 2025 at 10:52 AM.
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