brake switch again, is this possible?? - PeachParts Mercedes-Benz Forum

chlubb · #1 02-11-2008, 04:09 PM

I replaced the brake switch 2 months ago. now my brake lights are stuck in the on position. I removed and checked the switch and it appears fine but once the top plug is connected, all 3 lights go on and stay on.
Are these switches junk or have there been other secondary causes to make them fail?

Thanks,
Chris

mbdoc · #2 02-12-2008, 08:04 AM

Did you use an OE part or a "Hella" aftermarket cheap part?

chlubb · #3 02-12-2008, 09:18 AM

OE MB part, just as Phil has on Fastlane.

mbdoc · #4 02-12-2008, 05:17 PM

Make sure! Hella brand have issues!

chlubb · #5 02-12-2008, 05:24 PM

who has hella and who doesnt? do the dealers sell hella?
thats where i bought mine last time, it has no brand designation on it.

mbdoc · #6 02-13-2008, 08:01 AM

Dealers sell OE parts. If you got it from the dealer you got the correct part.
Did you install it correctly by pre-loading the plunger an extra 1.5mm?

Many aftermarket parts co's will sell "Hella" brand as the OE brand isn't available in the aftermarket.

chlubb · #7 02-13-2008, 09:27 AM

MB,
I held in the plunger as I let the brake pedal out but in what way would I need to preload it?

mbdoc · #8 02-13-2008, 12:21 PM

MB issued this bulletin & suggests you set the switch 1.5MM deeper.

chlubb · #9 02-13-2008, 02:01 PM

the tappet is spring loaded, will it really set itself any different once you remove the spacer? it should just extend all the way out again.

mbdoc · #10 02-13-2008, 03:40 PM

It's not the position of the pin you are setting BUT the position of the switch itself.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode