2012 R350 Right side headlight won't turn off
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Joined: May 2011
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CLK500A
2012 R350 Right side headlight won't turn off
Got home today and noticed on my wife's r350 the right side headlight was still on after my wife's car had been off and parked for a few hours. She had it detailed earlier today, and I'm afraid they did something to mess it up.
Any advice on how to get it to turn off?
Ps. This is not the DRL system, all the other lights turn off after 10 seconds from the car being turned off.
Any advice on how to get it to turn off?
Ps. This is not the DRL system, all the other lights turn off after 10 seconds from the car being turned off.
Thread Starter
Newbie
Joined: May 2011
Posts: 8
Likes: 0
CLK500A
Newbie
Joined: May 2020
Posts: 7
Likes: 3
R300
Got home today and noticed on my wife's r350 the right side headlight was still on after my wife's car had been off and parked for a few hours. She had it detailed earlier today, and I'm afraid they did something to mess it up.
Any advice on how to get it to turn off?
Ps. This is not the DRL system, all the other lights turn off after 10 seconds from the car being turned off.
Any advice on how to get it to turn off?
Ps. This is not the DRL system, all the other lights turn off after 10 seconds from the car being turned off.
I just having the same problem with my right bixenon headlamp.
How did you solved it?
What fuse can I disconnect to turn it off and save my battery until I found a solution?
Thanks!
Newbie
Joined: May 2020
Posts: 7
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R300
can't solve it yet. Help will be wellcomed.
Finally had access to the xenon bulb and disconnected it. Then the xenon light wen't off (of course, it's not magical).
I started the engine and I was there is NO ERROR in the display. Disconnected bulb is not detected by the system, so I think maybe the problem is the ballast.
I need some instructions to dismount the whole headlight (remember, it's a facelift R300 with Bi-xenon) and then see what is the ballast reference and try to get it somewhere. I saw many of them even on Aliexpress and Amazon, but I need to be sure about the reference number.
PS: it seems the "bad" ballast has drained itself all the battery in one night.
Regards
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Newbie
Joined: May 2020
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R300
Is normal warer enter in the SAM?
I will try to access to the front SAM tomorrow (I has been just operated of my knee a week ago and I’m not 100% operative 😅.
Do you think is possible to open the SAM itself and try to clean the rust up with 0residual cleaning fluid and let it dry?
there are any “changeable” discrete component to change inside? (Triacs, transistors, capacitors?
(I’m experienced in sensible electronic repair works)
regards
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Newbie
Joined: May 2020
Posts: 7
Likes: 3
R300
SOLVED
PROBLEM SOLVED thanks to your help:
The problem was in the front SAM under the co-driver floor. Somekind of miscontact in the connectors.
As soon as I touch the connectors, the xenon headlight went off
.I unpluged all the connectors (engine contact off) and I cleaned it with Zero waste fluid and now everything is ok.
There was no rust there, everything was clean, but I felt somekind of humidity under the floor matt.
In this space under the floor, I found a little battery (sealed lead acid). I don't know what this battery do.
Regards
Senior Member
Joined: Mar 2017
Posts: 258
Likes: 50
R320, Astro, JSW, ST4
That little battery is the power source for actuating the transmission park reverse drive.
Fail-safe power so car can put itself into park, or you can take it out of park if main battery fails.
Fail-safe power so car can put itself into park, or you can take it out of park if main battery fails.
