WHY O WHY

[inthegarage]

Mercedes brake light switch fail !!!!!!!!!!!!!!!!!!! Why font Mercedes upgrade the quality of the switch? Answer because its a cash cow

 

[whitenemesis]

How old is the car, how many miles covered?

 

[inthegarage]

How old is the car, how many miles covered?

I think that is not relevant I was told about a mates CLK that had a switch under warranty when 12 months old, name other makes that go through brake switches like Mercedes do

 

[Deleted member 126251]

First time I've heard of one failing. I think the age and mileage of the car is very relevant. We've owned MBs for about 20 years and never had a problem!

 

[KillerHERTZ]

Mercedes dont manufacture them.

 

[poormansporsche]

It's not just Mercedes. All brake pedal switches are subject to water ingress from wet feet. Least they are not overly expensive and relatively easy to diy replace.

 

[clk320x]

First time I've heard of one failing

They are a very common fault

 

[grober]

Problem is that they are no longer just a brake light switch but serve to inform several braking/stability control systems that the driver is actually requiring the car to slow down. As such there is perhaps a case for making them more robust.

 

[markmifsud]

"touching wood as I speak" I have had my 02 CLK320 for 12 years or so and not yet replaced a brake pedal switch

 

[Archierust202]

I had to replace the one on my 2002 CLK430 last year.....

 

[DSM10000]

I think that is not relevant I was told about a mates CLK that had a switch under warranty when 12 months old, name other makes that go through brake switches like Mercedes do

Absence of evidence is not evidence of absence!

 

[219]

It's not just Mercedes. All brake pedal switches are subject to water ingress from wet feet. Least they are not overly expensive and relatively easy to diy replace.

It is probably since they went to purely mechanical switches which need to be in the pedal box , and usually in a cheap plastic housing .

In my earlier cars , the brake light switch was hydraulically actuated and usually screwed into the master cylinder . Being a sealed metal unit water ingress wasn’t an issue , although they could fail in later life .

 

[Deleted member 126251]

They are a very common fault

As stated I've had MBs for over 20 years - never had a problem so I'm not going to start worrying.

 

[DSM10000]

It is probably since they went to purely mechanical switches which need to be in the pedal box , and usually in a cheap plastic housing .

In my earlier cars , the brake light switch was hydraulically actuated and usually screwed into the master cylinder . Being a sealed metal unit water ingress wasn’t an issue , although they could fail in later life .

Very much like the Series Land Rovers!