Do I have front & rear brake wear sensors, can I trust them?

[anonymous-user]

I have a 2014 S212 E Class estate - E220 CDI amg line or amg sport or whatever (!), the one with the drilled front brake discs if it makes a difference.

Am I correct in thinking the car has front AND rear brake pad wear sensors, I know it does on the front?

If so, can I trust them implicitly to tell me when I should replace them?

I ask as of course my local main dealer tells me at every service that the pads are 60% or 80% worn, and has done with every Merc I've ever taken them over the last 10 years - so I certainly don't trust them.

Visually they look ok if a little low at the back, but looking at new pads that may be the design of them - the 'meat' on the rear pads appears to slope so that the thickest part is the side you can't visually see, you'll always see the thinner side, I might be wrong on this. I don't want to take things apart or replace pads before their time if the sensors can be relied upon.

TIA.

[r129sl]

I think there is a single wear sensor on the back brakes.

[rickh]

I have a 15/15 e220 Saloon , Brake pad warning lamp came on, needed front pads, they had about 500 miles left in them, i replaced the disks at the same time although they could have been used again, for the cost it wasnt worth not doing it! while everything was stripped down..

[anonymous-user]

Thanks chaps.

Sound like its not worth the risk of trusting the sensor - if it activates when the pads are that close to being metal, and theres only one, a slight imbalance could mean the non-sensor side is metal on metal before I find out!

And as I dont trust the local main dealer who are truly hopeless, to tell me truthfully if theyre close to being done or not, its time to get my hands dirty...