Brake Light Switch - MBWorld.org Forums

Jun 9, 2020 | 10:33 AM

joonman

Thread Starter

Newbie

Joined: Mar 2011

Posts: 9

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From: Montreal

2008 ML350, 2011 S450

Brake Light Switch

Hi. I need to replace the Brake Light Switch. I am unable to find the location of this and a procedure on how to replace it. I found many instructions on the WEB, but not for W221. Thanks

Jun 9, 2020 | 06:14 PM

pmercury

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hi, there is no procedure

just go down there and remove it

Jun 10, 2020 | 06:42 AM

joonman

Thread Starter

Newbie

Joined: Mar 2011

Posts: 9

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From: Montreal

2008 ML350, 2011 S450

Thank you for the information. I guess I have to remove the plastic panel below the dashboard first to have access.

Jun 10, 2020 | 07:45 AM

pmercury

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yes the last lower part might be enough

Jun 12, 2020 | 05:38 PM

joonman

Thread Starter

Newbie

Joined: Mar 2011

Posts: 9

Likes: 0

From: Montreal

2008 ML350, 2011 S450

I change the brake light switch, but unfortunately I am having the same issue. My brake light is on all the time, even though the brake is not pressed. Also, car's push-button start will start the ignition without the brake being pressed. So, car is getting a signal that brake is pressed all the time. Any ideas as to what might be wrong? Thanks for your help.

Jun 13, 2020 | 11:20 AM

konigstiger

Out Of Control!!

Joined: Jul 2003

Posts: 15,901

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From: North Scottsdale, AZ

'71 Pinto

Have someone pull fault codes using MB diagnostics.

Jun 17, 2020 | 03:41 PM

konigstiger

Out Of Control!!

Joined: Jul 2003

Posts: 15,901

Likes: 4,630

From: North Scottsdale, AZ

'71 Pinto

Quote:

Originally Posted by joonman

Thank you for the information. I guess I have to remove the plastic panel below the dashboard first to have access.

See attachments.

Attached Files

install mechanical stop lamp switch.pdf (184.5 KB, 603 views)

install cover below instrument panel (left).pdf (287.8 KB, 282 views)

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Jun 26, 2020 | 06:52 AM

joonman

Thread Starter

Newbie

Joined: Mar 2011

Posts: 9

Likes: 0

From: Montreal

2008 ML350, 2011 S450

Thank you. At the end, it was the Brake Stop Light switch after all. When I installed first, I did not adjust the gray plastic piece that needs to be pressed closer to the brake pedal. Now everything is back to normal. No more permanent brake light constantly on, ESP light no longer comes on and Cruise Control is now functioning once again. All that trouble caused by one defective switch. Thank you for your help.