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Location of R129 Parking Brake Switch

8.4K views 7 replies 6 participants last post by  silverbird  
#1 ·
No don't need advice but since this forum (with the help of Google) has helped me with a number of things, and the location was never resolved in the threads I read, here is my contribution.

A little background. I started getting some weird electrical symptoms on my 1996 SL500, ASR light on, CC not working, etc. Did the normal check of the fuse boxes and everything OK.

Then I remembered a similar experience on the 300E - confirmed here - a replacement of the brake light switch could possible cure whatever electrical ailment ails you. A slight exaggeration, but not by much.

That cured the problem, but then after putting it all together the brake light stayed on (!?) and I am thinking I must have knocked something loose in that mess. Thanks to idiotic federal rules the thing is dinging too (like I can't see the RED brake idiot light???)

The parking light switch is similar in design to the brake light switch - secured by a clip - how mine was knocked loose I can't say - but in picture 1 you cannot see it until moving the wire loom - it fits in the rectangle of the parking brake assembly - and getting those clips to catch was a bear (glad I am not being paid by the book rate) - 2nd picture you can see it better. You can also see the black knocked-off switch if you look carefully ;-) At $10 I put a new one in - after 17 years didn't want to refit the old one and have to do this all over again.
 

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#2 ·
Nice DIY. This is sticky material. It amazes me people even use this parking brake. If the car was a stick shift, okay, but that's what park is for. I tried mine once, it worked and never again. If it works, leave it alone is the way I roll.
 
#3 ·
Yeah just like the kid in the Civic a few years ago that did the same thing, something broke and it rolled into my van. Van had a busted tail light, Civic was dented from fender to quarter panel. IMO its there for a reason, use it...that's how I roll.
 
#4 ·
The only time I use a parking brake is - well, 2 occasions. And the reason is not breaking the parking pawl in the automatic transmission


On a hill - brake first, set the ebrake, then put it in "P". Keeps the strain off the transmission.

Same thing if I am parallel parking and the space is tight. If someone bumps into me I don't want the force to hit that parking pawl.

But what bugs me about the MB parking brake - at least since the 60s they eliminated the handle between the seats. You knew the brake was on. With my 300E I would forget releasing it so many times (ended up replacing the shoes on the little drum) that I finally had to put a little reminder on the dash - release the brake!

I guess with the "dinging" that was MBs way of reminding you about the parking brake - instead of putting the release back where it belonged ;-)
 
#8 ·
Thank you wlb50! My red BRAKE light illuminated today and as you pointed out—it is annoying with the beeping. My hood release lever brushes against the emergency brake switch. When I pulled it today, it must have dislodged the switch from its mounting point. Reassembling the two panels at the knee and feet are horribly annoying too. Ugh. They still aren’t correct but I needed to retire for the night before I completely lost my patience.