Hello Forum

My W215 CL500 came up with the message BRAKE PAD - VISIT WORKSHOP on the MFD a few days ago - SO assumed the pads and Discs (Rotors) needed changing - I decided to do this task myself.

Surely enough - once removed that Fronts pads and Discs (Rotors) had seen better days - so replaced, installing a New sensor.

The rears are fine.

AnywayI still get the message BRAKE PAD VISIT WORKSHOP on the MFD - so I replaced the Rear Sensor as well - and still there.

Any pointers what i could check - BTW - also plugged her into STAR - NO Faults anywhere!

Help

Nik (UK)

 

Brake reservoir fluid level OK?
Changed sensor on BOTH front brakes or does your vehicle only have it on one side (cost saving!)
Stuart

 

Yup - Brake Fluid Level OK - Sensors are one on each axle (one in Front and one in Rear) changed both of those - This is driving me crazy!

 

Sure that there is only one sensor per axle?

Circuit is a simple loop. The sensor wire simply gets cut by the rotor.

Sometimes handbrake ON is also part of the circuit. Sure you have got the brake OFF?

Stuart

 

maybe make sure sensor is pushed all the way into the connection for the sensor. sometimes it goes in a little tight. or the new sensor wire is broken?

 

Hey guys

I have replaced the sensors with 2 sets of new ones can confirm that ther is only one on each axle, and confirm that parking brake is NOT on

I am wondering if there is breakage in the wiring somewhere - will check soon

again thanks

Nik

 

Hi,
Chassis221 may be spot on.
Were the sensors Genuine MB or some proprietary after market look alike part?
Maybe the connectors have not gone/been pushed pushed fully home.
As I stated the circuit is a simple loop so it should be relatively easy to do a bit of continuity testing.

Stuart

 

The Sensors are Genuine MB part - I also tried pushing as far as I could with hand - I will check for contunuity! - its a real shame a little issue like this takes so much time.

Again, thanks for your input and its forums like this this that give a better insite into issues

Regards

Nik

 

Do you have to replace the sensors during every change? And where can I find them?

 

some mercsneed basic setting of brake pads after replacing on diagnstic tool