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2008 E350 4M, 2016 Audi Allroad, 2019 Audi Q5
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Discussion Starter #1
Hey guys,

System is saying somethings going on...
No issues noticed with braking.

This is for the girlfriends 2002 CLK320.

Common issue. What should I check into first?

Thanks!
 

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2001 SLK 320(217K Miles), 2002 E320 Special Edition(183K Miles)
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3,467 Posts
Hey guys,

System is saying somethings going on...
No issues noticed with braking.

This is for the girlfriends 2002 CLK320.

Common issue. What should I check into first?

Thanks!
Brake light switch.
 

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2012 E350 :-) 2002 E320 (sold)
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432 Posts
What he said. Also, i guess the cruise control isn't working either? The BLS is a DIY and the switch is relatively cheap from the dealer - $40 or so.
 

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1999 E55, 2001 E320, 1990 560 SEC, 2004 ML350, 2001 ML55, 1995 S500, 1998 SL500, 2010 E550 Sport zoo
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7,035 Posts
Only buy the MB brand replacement switch - the knockoff's are horrible quality -
 

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2008 E350 4M, 2016 Audi Allroad, 2019 Audi Q5
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5,447 Posts
Discussion Starter #5
Now that you mention it, I remember a few weeks ago seeing the 3rd brake light stuck on while driving...

I'll get it replaced! Thanks guys!
 

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2008 E350 4M, 2016 Audi Allroad, 2019 Audi Q5
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5,447 Posts
Discussion Starter #6
Ordered Genuine MB on Thursday should be here in the next day or two....BUT

The girlfriend called me this AM saying it was stuck in park and wouldn't move. I figure this is related to the brake light switch? Totally given out now?
We managed to use a pen in the groove to get it into neutral and get her moving.

Sound like the same issue or could it be a neutral safety switch deal?
 

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2001 E320 wagon
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733 Posts
just did my brake switch on a 2001 e320 wagon. bought an original MB switch and it came with installation instructions on getting the plunger depth right etc. the worst part was removing the bottom panel as I didn't realize it came off with the front material covered piece, but it did give a good work space. the actual replacement took about 3 minutes. As they say make sure you pull the plunger all of the way out and then hold the pedal down when you install it (just push and twist to install) then put the feeler guage in the gap between the plunger and the brake pedal tang. let the pedal up and it sets itself on the feeler gauge.
Remember that the switch is always depressed and the plunger goes out to switch the lights on etc - its backwards to common sense :D
weird thing with mine is that once I got the ABS, BAS, ESP lights the second time I started to have problems starting my car with the electronic key. for the 5 days while I waited for the switch it didnt work once or twice a day, wouldn't unlock the steering etc - took 5 or 6 attempts to get the key recognized by the EIS - yet there seems to be no communication between the brake switch and the EIS. Just to satisfy myself I started the car with the brake switch removed and after 2 or 3 attempts it worked.
replaced the switch 4 days ago and have not had a problem with the EIS since then. Just one of those little oddities!
 

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2008 E350 4M, 2016 Audi Allroad, 2019 Audi Q5
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5,447 Posts
Discussion Starter #8
Installed the MB switch today. I did notice the old one was slightly shorter, but not by much. I installed the new one, and checked to see if the brake light would stay on at rest, and it did not...so I should be good right?

Took a total of 10minutes including a few minutes contemplating about the length of the plunger...

EASY!

$240 at the dealer to do this job? Cost to own a Mercedes? I say not more than a Japanese car if you are handy...
 
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