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

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Old 05-27-2005, 03:45 PM   #1
Join Date: May 2005
Posts: 2
headlights fuse or relay


My right headlight low beam failed and after replacing with a new light bulb I still get the warning message and a non-working light(the left still work). Does anyone know if there is a separate relay/fuse for the each headlight. The owner manual only point to the fuse/relay box without any detail.


PS. it is a 2001 S430
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Old 11-21-2007, 01:03 PM   #2
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Location: Key Biscayne, FL
Posts: 27
Drives: me: 2001 S500, 1993 K1500 wife: 2003 X5
Low beam, high beam and turn signal don't work

Guys, rather than start a new thread, heres MY problem. My passenger side headlight is not working at all. Does anyone know if theres a fuse or relay that may be causing this? Where would it be located? Thanks for your input.
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Old 11-23-2007, 04:46 PM   #3
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Head lamps are controled by the front SAM units.
Left unit controls right head lamp, and right sam controls left lamp. Fuses for each are in the top of the sam. If it is a zeon lamp, check the ignitor.
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Old 11-23-2007, 05:54 PM   #4
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Thanks for the info. damaged. Does anyone have a picture or diagram of the SAM? I really don't have a clue what it looks like.
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Old 01-15-2011, 03:51 PM   #5
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SAM????? where andwhat is it? never heard of it. both my low beam xenon headlights are out
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Old 01-18-2011, 12:54 PM   #6
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Drives: 2005 S500 4-Matic, 1978 450SL
You definitely need to see the "W220 S-Class Owners Start Here" sticky at the top of the forum. Scroll down to post #36 for a version of the "Encyclopedia" that is uninterrupted by people who don't read.

You will find discussion of the SAM under "Electrical System." SAM means "Signal Acquisition Module." It is in fact a kind of router for switch input, sensor input, and system operation. If you come across discussion of "Electronic Fuse" be aware that they are a component of the SAM, and they are circuits, not fuses in the common usage.

2005 S500 4-Matic with
Gateway 500 iPod integration

1978 450SL restoration project

Formerly: 2000 S500 with
Ice>Link Plus iPod integration,
MikBox, and Upgraded voice control

Last edited by Skylaw; 01-18-2011 at 12:58 PM.
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Old 05-11-2012, 11:13 PM   #7
Join Date: May 2012
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Drives: mercedes s430
s430 mercedes low beam not working/ not bulb

s430 mercedes low beam not working and it's not the bulb. HELP!!!!
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Old 05-11-2012, 11:13 PM

05, 2001, 2004, 500, beam, box, boxes, clk, fuse, headlight, location, low, number, s430, s500

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