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Replacing Your Light Switch Module
 
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Pelican Technical Article:

Replacing Your Light Switch Module

Steve Vernon

Time:

1 hour1 hr

Tools:

T20 Torx, trim removal tool

Applicable Models:

Mercedes-Benz W203 (2001-07)

Parts Required:

New switch module

Hot Tip:

Don't scratch the leather

Performance Gain:

Working lights

Complementary Modification:

Clean the leather

If you are beginning to have troubles with your light switches there is a god chance it is the light switch module going bad. While the switch module is not difficult to replace it is expensive and can only be ordered as a unit including the switch plate. Make sure you have your VIN number handy as you will need it to order a replacement.

You will need to open the driver side door to give you access to the T20 screw located under the parking brake handle as well as remove the access panel on the end of the dash.

Begin by pulling the brake handle out. This will give you access to a single T20 Torx screw located under the handle. Unscrew this and remove it.

Remove the access panel at the end of the dash. It just pulls straight off.

Look inside and you will see one metal clip holding the module in place. There is another one on the other side of the unit.

Compress the clip and push the unit forward until it releases from the dash.

Turn the module over and release the wiring harness. Push in the clip and slide the arm on the connection down, releasing it from the module.

Installation is the reverse of removal.

You will need to open the driver side door to give you access to the T20 screw located under the parking brake handle (red arrow) as well as remove the access panel on the end of the dash (yellow arrow).
Figure 1

You will need to open the driver side door to give you access to the T20 screw located under the parking brake handle (red arrow) as well as remove the access panel on the end of the dash (yellow arrow).

Begin by pulling the brake handle out.
Figure 2

Begin by pulling the brake handle out. This will give you access to a single T20 Torx screw located under the handle. Unscrew this and remove it (red arrow).

Remove the access panel at the end of the dash.
Figure 3

Remove the access panel at the end of the dash. It just pulls straight off.

Look inside and you will see one metal clip holding the module in place (yellow arrow).
Figure 4

Look inside and you will see one metal clip holding the module in place (yellow arrow). There is another one on the other side of the unit.

Compress the clip and push the unit forward (yellow arrow) until it releases from the dash.
Figure 5

Compress the clip and push the unit forward (yellow arrow) until it releases from the dash.

Turn the module over and release the wiring harness.
Figure 6

Turn the module over and release the wiring harness. Push in the clip and slide the arm on the connection down (red arrow), releasing it from the module.

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Comments and Suggestions:
JC Comments: Hi. my C32 has an issue with the mirror adjustment switch, no matter whether I press the "up" or "down" button, it will only goes down. I need to use my "memory position" to get back to the correct setting. Therefore I no longer can adjust the passenger mirror for reverse parking. Have you ever heard of this mirror issue before? Do you think if I swap a second hand unit and this should fixed the issue?
November 19, 2016
  Followup from the Pelican Staff: I would check if the switch is faulty. Monitor the signal to see if it is sending the right position request. if so, the mirror is at fault. - Nick at Pelican Parts  
coxy Comments: how do you remove the knee bolster on a c220 w203 2005 please as i need to replica the light switch and can't get top the inside clip
August 24, 2016
  Followup from the Pelican Staff: We don't currently have that tech article. If we get a chance to perform the procedure, we will be sure to document it.

I would grab a repair manual. It will have the procedure, special tools and torque specs.

Give our parts specialists a call at 1-888-280-7799. - Nick at Pelican Parts
 
Schweppes Comments: Thank you !!!
August 20, 2016
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
Schweppes Comments: I am not sure, and I don't know how to check does it have daytime running lights or not? If it has, is there any possibility to change, because according to my country's regulations I can drive just with position lights on. Now it is impossible and it bothers me !!! Please tell me how to check does it have daytime running lights. Thank you !!!
August 18, 2016
  Followup from the Pelican Staff: You can check with your owner's manual or contact a local dealer with your VIN. They can tell you what your vehicle had new. - Nick at Pelican Parts  
Schweppes Comments: My w203 2002 has headlights on even the light switch is on "0" position and in the instrument table the "manual" lighting is selected. On dark time, headlights go on in the moment ignition switch is in position "1", during the day time the headlights go on after you start the engine. Please some advise me what is the problem ? Thank you !!!
August 17, 2016
  Followup from the Pelican Staff: Are you sure your vehicle doesn't have daytime running lights? If so, this is normal. - Nick at Pelican Parts  
Musa Comments: Wow, good thing I search first trying to attempt this procedure. I was thinking to stick a flat head screwdriver and pry it out on a 2004 CLK500. Just a heads up there are 3 or 4 different part numbers.

I need to determine if it's the switch first before I order one.

I have the left mirror set and when I try to adjust the mirror it adjust the right mirror. The mirror adjust with memory seat button. No issue with the right mirror control. Just the left mirror is giving me issue.
May 31, 2016
  Followup from the Pelican Staff: if working opposite the way it should, the switch may be shorted . - Nick at Pelican Parts  
Nick S Comments: Is it possible to change the lighting inside the control? Mine works fine, but the lights are out. If so, what bulbs are needed?
April 15, 2015
  Followup from the Pelican Staff: I don't believe so. - Nick at Pelican Parts  
sckothmann Comments: "Followup from the Pelican Staff: part manufacturers do not supply instructions with the parts. We do our best to create tech articles as we can.
We don't currently have that tech article. If we get a chance to perform the procedure, we will be sure to document it."

OK, thank you anyway.

March 19, 2015
  Followup from the Pelican Staff: No problem. - Nick at Pelican Parts  
sckothmann Comments: Is there a video, or instructions, available online, that have the information on how to replace the "BRAKE LIGHT SWITCH" on a 2001 MERCEDES SLK 320 R170? I purchased one thru your company, but it came with no instructions.
March 17, 2015
  Followup from the Pelican Staff: part manufacturers do not supply instructions with the parts. We do our best to create tech articles as we can.

We don't currently have that tech article. If we get a chance to perform the procedure, we will be sure to document it.




- Nick at Pelican Parts
 
BRL Comments: My 2001 E320 access panel on the side of the dash does not provide full access to the light switch. There is molded dash material blocking access that wraps around the front.

Can you advise how to remove the headlight switch on this model?
April 8, 2014
  Followup from the Pelican Staff: You may have to remove the knee bolster. Once the knee bolster and lower trim panel are removed, you should be able to access the switch. - Nick at Pelican Parts  
Joe Comments: thank you, it was helpfull
January 23, 2014
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 

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