M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Parking light stays on?

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Old 12-14-2019, 02:55 PM
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Parking light stays on?

Any idea why this parking light will not go off? It just stays on.

thank you.




Old 12-15-2019, 08:20 AM
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Please UPDATE YOUR PROFILE in USER CP to include the year and where you live.


Old 12-15-2019, 08:30 AM
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Now that my location and year are updated, the light went off. Snarky comments aside. Thank you for the response, user CP taken care of. After a couple hours of research all I can find are some Arabic dudes on youtube digging around through lifted carpet and cheerios to remove and replace the front SAM module. Not sure if for sure that is my problem, the only explanation here:
https://www.justanswer.com/mercedes/...ghts-stay.html

Thanks much!
Old 12-15-2019, 08:35 AM
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Please tell us how you fixed the problem.
Old 12-15-2019, 08:40 AM
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Originally Posted by Maj. Dundee
Please tell us how you fixed the problem.
The problem is NOT fixed. I am saying that all I can find is the link above which points to the front SAM module. I am at a loss, and need help.
Old 12-15-2019, 08:42 PM
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Just the SAM then? No one else ever have this parking light stay on?

I ended up just unplugging it to save my
battery.

If indeed all we have is the front SAM to blame, where is it exactly? Under passenger seat? Front? Rear?

thank you.
Old 12-16-2019, 06:10 AM
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Your problem does not mean that it is the front SAM.

Did you turn the Rotary Light Sw . OFF?

You unplugged WHAT? Be more specific when you post.
Attached Files
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Rotary Light Sw. Desc..PDF (60.3 KB, 275 views)
Old 12-16-2019, 07:23 AM
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Originally Posted by Maj. Dundee
You unplugged WHAT? Be more specific when you post.
Dear Maj. Dundee,

Maybe it was wrong of me to assume that you all would assume that I was bright enough to ensure the “rotary” switch was rotated to the off position, which any joe would be inclined to do so when the light wouldn’t switch off.

That being said, I unplugged the light, itself, from behind the left headlight assembly in order to turn it off and conserve battery power. The front SAM module, as I’d indicated in earlier posts, is outside the scope of my knowledge thus far. This brings us to the original intent of this thread; to learn, understand and converse with others more knowledgeable on the subject.

I trust this message finds you well.

V/r,

CPT Maddox
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Old 12-16-2019, 08:57 AM
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Yes the message finds me well, but you still have to understand that I cannot assume anything as to what you disconnected. Why couldn't you just say I disconnected the light switch?

The parking/standing lights are controlled by both the front & rear SAMs. Have you checked the floor of the rear SAM for water entry? It is famous for allowing rain water entry.
Old 12-16-2019, 10:16 AM
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Originally Posted by Maj. Dundee
Yes the message finds me well, but you still have to understand that I cannot assume anything as to what you disconnected. Why couldn't you just say I disconnected the light switch?

The parking/standing lights are controlled by both the front & rear SAMs. Have you checked the floor of the rear SAM for water entry? It is famous for allowing rain water entry.
Yes sir, I did indeed check and there was water in both rear compartments, but about 4" below the SAM. Keep in mind, this was parked for the better part of two years, at "nose-up" pitch in their driveway. I don't think it was driven around with water present.

All lights, guages, etc.. work. Radio, dash, everything seems fine. Only the front left (as pictured) light remains on, which again, I have unplugged the light.

The only water damage I can visually see is the hydraulic pump solenoid in the rear tire-well. The foam around it was holding a lot of water.

Thank you
Old 12-17-2019, 03:04 AM
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You must buy both tail lamp seals (dealer only) to stop any further water entry.

Are all 4 parking lamps on or is it one or two?


Old 12-17-2019, 08:15 AM
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I will for sure replace both rear lamp gaskets. As far as the light remaining on - it is ONLY the front left (driver side) small round light as pictured in the original post. That is the only uncooperative light.
Old 12-17-2019, 07:51 PM
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Have you tried (with key out) putting indicator to left or right? incase it thinks it is parked and you want one light on so the car is seen? have someone look from outside and see if there is any change or blonk when you do this.

when you go through dash menus try turning off the turning off all the lighting functions etc (like surround - etc etc so you can rule that out

Have you pulled out the rear sam - or just got to it - to see if it looks like it has ever been wet (agree with MajDundee) - or checked under the RH front seat to see if it looks wet or ever wet under the or around the battery? front SAM (maybe some sign of rust would indicate been wet)
PS I am assuming your battery and front SAM is under RH front seat - mine is but I am RHD not LHD in Australia
Old 06-23-2021, 11:11 AM
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Hi, Have you found any solution for this problem yet?

I have got exactly the same problem, i disconnected the bulb like you did , to prevent a dead battery every morning.

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Old 06-23-2021, 02:35 PM
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Originally Posted by utopify
Any idea why this parking light will not go off? It just stays on.

thank you.


I was have same problem with front turn signal

https://mbworld.org/forums/m-class-w...ay-always.html

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