Wiring diagram and Avantgarde LED rear lights question [ S211 / W211 ]

DJFarmo

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Wiring diagram and Avantgarde LED rear lights questions [ S211 / W211 ]

Hi,

I currently have a problem with the rear lights going haywire on my 2003 S211. It has been going on since I acquired the car 1 year ago. It's very much an intermittent fault - when it occurs the main (outer) rear lights switch off and the backup lights (in the boot lid) come on instead. I also get 6 messages appear on the MFD which are shown at the bottom of the post.

When the problem occurs and the backup lights come on, the offside rear brake/side light then begins to flash every 3 seconds or so, whilst the near-side one remains completely out. Sometimes the car will switch back to the normal lights; other times the backup lights will continue to be used for any further journeys made that day.

I have an Avantgarde model, so the lights in question that go out are LED lamps, though the backup lights use conventional bulbs.

I've downloaded what I believe to be the relevant wiring diagram from WIS, but I have a question. I have included an excerpt of the wiring diagram below - please click it to view it in high resolution, or click the download link below it to get the highest possible resolution image, which will make the symbols in the green box much easier to see



Full resolution image can be downloaded here: https://docs.google.com/leaf?id=0B6IGAj5zSnHCMmE1NTRmZWQtZGFiNy00MTdkLThlNWEtMGU5MDIyZjg2N2Vm&sort=name&layout=list&num=50

I've also attached to this post the legend for this diagram. I have crossed in red out two of the boxes in the diagram as the legend would indicate that these connections are specific to saloons, whereas I have an estate.

My question relates to (what I believe to be) the connector between the rear signal actuation module (SAM) and the wire that goes to the main rear light clusters that I am interested in (the yellow box).

I've looked the the explanatory documentation in WIS, but I've not found anything relating to the depiction of connectors on diagrams.

Questions:
  1. What does the number '14' represent? Is it a connector that plugs into the SAM?
  2. What do the terms 'SL' and 'FRA' that can be seen in the green box mean?
  3. Do the numbers next to these terms refer to the terminal number within a connector plug? If so, will WIS contain a diagram of that plug that I can view?

I should add that I only started using WIS yesterday, so I may not be using it effectively, for which I apologise, though I would be grateful for any guidance. I have tried consulting the documentation on reading wiring diagrams that is available in WIS (and attached), though to no avail.

I've also included pictures below of the fault messages on the MFD. They are shown in the order in which they appear on the display. Would they suggest that it is the offside rear light (the one that flashes every 3 seconds or so when the backup lamps come on) that is the problem, rather than the near-side one that just remains off when the backup lamps are on?

Image002.jpg


Image003.jpg


Image004.jpg


Image005.jpg


Image006.jpg


Image007.jpg


If anyone can give me any info on this that would be much appreciated. My plan is to strip it all down on Sunday, but I'd like to do my homework before I do that!

Thanks for looking.
 

Attachments

  • Rear SAM (N10-2) Wiring Diagram Sheet 1 - Legend PE54.21-P-2108-60DA.pdf
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  • Wiring diagrams - Use of.pdf
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  • Wiring diagrams - Abbreviations.pdf
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  • Wiring diagrams - Abbreviations of signal and circuit designations.pdf
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l33nut

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resolution?

Hi

I would be interested to know if you found a solution to this problem , my 270cdi advantgarde is suffering from the same faults but only when lights are on . malfunction clears after lights are turned off and ignition restarted.
 
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DJFarmo

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Hi

I would be interested to know if you found a solution to this problem , my 270cdi advantgarde is suffering from the same faults but only when lights are on . malfunction clears after lights are turned off and ignition restarted.

I did indeed find the solution and I learned a lot about the how the rear SAM controls the lights in the process. The best way for me to help you is for you to give me more information about the symptoms and also, if you can, take photos of all of the error messages that appear in the display. You'll also need to let me know whether you have a saloon or estate.

Please direct any replies via this page so that I can maintain a central reference page about this problem: http://www.mbclub.co.uk/forums/electronics/105318-help-wiring-diagram-intermittent-rear-lights-problem-s211.html#post1159776

Thanks.
 

yiannossavva

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I read that the problem is the leds. I have the same problem. in next week i will change the led and i will tell you if its ok
 

yiannossavva

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I fix the problem

There is a faulty chip in the right led. LM2904

I don't change the board i change the chip
 

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television

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I fix the problem

There is a faulty chip in the right led. LM2904

I don't change the board i change the chip

Congratulations, that make for a nice cheap repair
 

Miffy

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Those SMD are quite a bit larger than the ones I used for my interior. With a little care and a low wattage solder iron its still very much a DIY job.
 

television

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Thank you

The cost was 1Euro!

It is not easy to change the chip. I am electronic technician.....easy for me.

Yes I do not have that type of de soldering station, I clip the legs off then suck them up with a de solderer , fit the new one and float the pins with solder, then use a sucker to remove the solder from between the pins
 

yiannossavva

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In Cyprus can't find the smd chip type. I have to order and wait for that.
I change it with standard (larger chip) and solder it with wires.
 

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television

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In Cyprus can't find the smd chip type. I have to order and wait for that.
I change it with standard (larger chip) and solder it with wires.

That is certainly one way to do it,, never thought of doing that:D:D
 

Paulo72

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Hi DJfarmo

I too have and S211 2003 avantgarde, could you give me a help here, do you have the ECU Wiring diagram, Im trying to do the EGR emulator, but not shore about the wiring, that would be a great help, I noticed that you have some Wiring diagram from the S211 but did found the ECU Wiring diagram, that would be a great help to see the MAF and ERG colours on the ECU pins.

Regards
Paulo
 
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DJFarmo

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Sorry - I'm afraid I no longer have what you are after.

Hi DJfarmo

I too have and S211 2003 avantgarde, could you give me a help here, do you have the ECU Wiring diagram, Im trying to do the EGR emulator, but not shore about the wiring, that would be a great help, I noticed that you have some Wiring diagram from the S211 but did found the ECU Wiring diagram, that would be a great help to see the MAF and ERG colours on the ECU pins.

Regards
Paulo
 

Jules55012

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SL 55 LED Problem

Hi my 2003 SL 55 rear LED o/s has a similar intermittent fault.
Is there a fix for this or is it the usual new for old replacement?
Cheers
Jules
 

television

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Are you sure it is an LED lamp, the 230 did not get LEDs till 06-06
 

Jules55012

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Hi Malcolm

Hope you're well?

I thought the o/s tails were LED as I thought I read it in the owners manual.

I did't think it would be a straight bulb replacement as it says return to dealer.

I've had the wiring hooked up to some spare SL500 lights and all the faults go which would indicate the unit was at fault.

The lights initially illuminate but then a short time after use the rear section of the tail lamp go out (the section that curves around the the body stay illuminated).

With it being intermittent I was wondering if it was faulty wiring which could be repaired rather than replacing the whole unit for £275.

Cheers
Jules
 

television

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You can remove the PCB with the LEDs on to see if a dry joint, you could remove the PCB from you 500 lamp and put it in your AMG one.

The lamp is only held in with 4 nuts about 6 or 8mm
 

Jules55012

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Thanks Malcolm

Certainly could look for dry joint but the 500 unit was borrowed for test so can't really nick its PCB ;)

Do you have a diagram for removal? Are they removed without touching the boot/roof mech that sits immediately in front of it?

Cheers
Jules
 


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