SL/R230: Parking light stays on when car is off
Thread Starter
Member
Joined: Jan 2003
Posts: 182
Likes: 18
From: Cedar Park, Texas
2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
Parking light stays on when car is off
Hi all,
I've got a strange one that just started showing up. The drivers light parking light is staying on after the car is turned off. Went back to the car an hour later and only the drivers side parking light is on. I connected it to the diagnostic tool I have and when I look at all off the options to do two-way communication I only have these.
Right low beam
Left main beam
Left front side lamp and parking lamp
left from turn signal lamp
Left foglamp
I swapped out light bulbs to see if it was a bulb issues and both lights test correctly. Now my question is, would this be indicative of a failing (or failed) drivers side SAM? I'm not getting any codes that there's an issue with the SAM.
Thoughts?
J.D.
I've got a strange one that just started showing up. The drivers light parking light is staying on after the car is turned off. Went back to the car an hour later and only the drivers side parking light is on. I connected it to the diagnostic tool I have and when I look at all off the options to do two-way communication I only have these.
Right low beam
Left main beam
Left front side lamp and parking lamp
left from turn signal lamp
Left foglamp
I swapped out light bulbs to see if it was a bulb issues and both lights test correctly. Now my question is, would this be indicative of a failing (or failed) drivers side SAM? I'm not getting any codes that there's an issue with the SAM.
Thoughts?
J.D.
MBWorld Fanatic!
Joined: Mar 2008
Posts: 1,232
Likes: 168
From: Glasgow, Scotland, UK
SL 350 R230 (3.7L with AMG Speedshift autobox)
Silly question, but you sure you have not just turned the parking lights on at the control knob?
11 o'clock position will leave on right side front and rear lights when parked, 10 o'clock for the left side.
11 o'clock position will leave on right side front and rear lights when parked, 10 o'clock for the left side.
Thread Starter
Member
Joined: Jan 2003
Posts: 182
Likes: 18
From: Cedar Park, Texas
2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
Triple checked everything. I'm really leaning towards a SAM issue. The only thing my scanner sees from the right side is the low beam light. I read a few other posts online describing some odd behaviors. Everyone post I read had a slightly different issue.
Anyone know the part number of a drivers side SAM? I blew out my VM that had WIS installed.
Anyone know the part number of a drivers side SAM? I blew out my VM that had WIS installed.
Senior Member
Joined: Nov 2021
Posts: 470
Likes: 119
From: North West England
SL500
Are you looking at data from the correct SAM?
There are two SAM's that control the front lights. The lights are crossed between SAM's, so Left SAM controls some light on Left side, and some Lights on right side, and the Right SAM likewise!
However it looks like driverside SAM does control the parking/Standing light on Left hand side.
First question to ask when having issues with lights is have the been changed for LED. Often cause issues.
With good diagnostics you should be able to see the status of the light.
There are two SAM's that control the front lights. The lights are crossed between SAM's, so Left SAM controls some light on Left side, and some Lights on right side, and the Right SAM likewise!
However it looks like driverside SAM does control the parking/Standing light on Left hand side.
First question to ask when having issues with lights is have the been changed for LED. Often cause issues.
With good diagnostics you should be able to see the status of the light.
Thread Starter
Member
Joined: Jan 2003
Posts: 182
Likes: 18
From: Cedar Park, Texas
2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
Are you looking at data from the correct SAM?
There are two SAM's that control the front lights. The lights are crossed between SAM's, so Left SAM controls some light on Left side, and some Lights on right side, and the Right SAM likewise!
However it looks like driverside SAM does control the parking/Standing light on Left hand side.
First question to ask when having issues with lights is have the been changed for LED. Often cause issues.
With good diagnostics you should be able to see the status of the light.
There are two SAM's that control the front lights. The lights are crossed between SAM's, so Left SAM controls some light on Left side, and some Lights on right side, and the Right SAM likewise!
However it looks like driverside SAM does control the parking/Standing light on Left hand side.
First question to ask when having issues with lights is have the been changed for LED. Often cause issues.
With good diagnostics you should be able to see the status of the light.
Senior Member
Joined: Nov 2021
Posts: 470
Likes: 119
From: North West England
SL500
Is the output status always ON?
If this is the case then it is likely something else keeping it ON.
What diagnosis tool are you using?
Not sure they can all force outputs OFF if it is switched ON internally.
Have you checked the status of the light switch You should be able to read it in the SAM. If not try disconnecting the light switch and check again the output with your diagnostics.I dont think the light switch is CANBUS, but it will use some comunication, maybe just binary signal.
If this is the case then it is likely something else keeping it ON.
What diagnosis tool are you using?
Not sure they can all force outputs OFF if it is switched ON internally.
Have you checked the status of the light switch You should be able to read it in the SAM. If not try disconnecting the light switch and check again the output with your diagnostics.I dont think the light switch is CANBUS, but it will use some comunication, maybe just binary signal.
Thread Starter
Member
Joined: Jan 2003
Posts: 182
Likes: 18
From: Cedar Park, Texas
2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
Have you checked the status of the light switch You should be able to read it in the SAM. If not try disconnecting the light switch and check again the output with your diagnostics.I dont think the light switch is CANBUS, but it will use some comunication, maybe just binary signal.
I'm using an autel MaxiDas DS808K, FWIW.
Trending Topics
Thread Starter
Member
Joined: Jan 2003
Posts: 182
Likes: 18
From: Cedar Park, Texas
2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
Really starting to look like a SAM issue. I plugged it up to my Autel diag tool and I can get confirmation from the switch when I turn it to the parking lights. It'll tell me that the switch is on (and of course the light is on too). But when I switch it off, the scanner tells me that it's off, but the light still stays on.
I think that's my smoking gun.
I think that's my smoking gun.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Member
Joined: Jan 2003
Posts: 182
Likes: 18
From: Cedar Park, Texas
2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
And the location? I must be looking at the wrong stuff because nothing seems to be telling me which relay it is.
Senior Member
Joined: Nov 2021
Posts: 470
Likes: 119
From: North West England
SL500
They can fail open circuit, or short circuit (so ON all the time, or OFF all the time.
However they normally blow OFF all the time.
But when I switch it off, the scanner tells me that it's off, but the light still stays on
A used one (with identical part number) may work fine, but really you need to use STAR/SDS system to transfer over the settings inside. All depends if options on doner car match options on your car.
Last edited by g0rsq; Jun 20, 2023 at 04:46 PM.
Thread Starter
Member
Joined: Jan 2003
Posts: 182
Likes: 18
From: Cedar Park, Texas
2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
Thread Starter
Member
Joined: Jan 2003
Posts: 182
Likes: 18
From: Cedar Park, Texas
2013 Porsche 911 Carrera 4S, 2004 SL55, 2012 Lexus IS250, 2021 Toyota Highlander
Ordered the same part number. Fingers crossed. We'll see how it goes.
Thanks to everyone that offered their thoughts. I really appreciate it. I'll keep everyone posted.
Thanks to everyone that offered their thoughts. I really appreciate it. I'll keep everyone posted.
Newbie
Joined: Jan 2023
Posts: 7
Likes: 1
Mercedes Benz SL500 R230
Parking light stays on when car is off.
Just a comment regarding this issue. - I have a 2004 SL500 with only 54K miles on it. I had issues with the Battery Control Module and dreaded red light icon . The module did its job however it was not communicating with the Can Bus correctly. I removed the module out of the vehicle and opened it. I found corrosion on the board where the center connector is located. I removed the corrosion using a toothpick, alcohol and contact cleaner. I found minute corrosion on other parts of the board and clean that also. I reinstalled the module and corrected the false Can Bus error . I then decided to check out other modules and found small amount corrosions on the rear SAM board , front right and front left SAM modules connectors. The right front SAM was the most difficult to remove and then reinstalled. All compartments inside the vehicle were completely dry no evidence of water intrusion. i attribute the corrosions to humidity. I now have " no malfunctions" display on the dashboard. If you follow this post you will have your work cut out for you. Good Luck
Member
Joined: Mar 2003
Posts: 143
Likes: 8
From: Newport News, VA
2005 SL500 & 2021 Jeep Willys Gladiator
German Parking Lights
It's not an issue. It is what is referred to the German parking lights and all cars in Germany are required to have them. I think you can disable it in the menus. They stay lit at half voltage. Many cars in country park on the street or on a curb in skinny streets and the lights help keep other cars from hitting you when navigating small side streets.
https://www.autotrader.com/oversteer...ide-car-269684
https://www.autotrader.com/oversteer...ide-car-269684
Last edited by Dr. Plastic; Jun 22, 2023 at 05:34 AM.
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
