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New member here. I installed new brake pads & rotors on my 2013 SLK250. Afterward, one of the parking brakes would not operate, and in the center display was a RED Parking Brake - See Owners Manual message. For the one brake which was working, it worked as usual. So, I replaced the electric drive/motor on the other brake, still the same issue. I could apply a 12 volt power source to the electric motors one at a time, get them to turn one direction, then reversing polarity, they turn the other direction. When on the caliper, they would clamp the rotor and release the rotor. But that one side would not function from the normal means. I took it to the dealer, and they suggested replacing the one caliper. Not sure what that would do since the motor works, the caliper works, they just don't work from the switch in the car.

So, I put 2 voltmeters on the real brake connector and actuated the parking brake switch. Neither volt meter indicated voltage, not positive or negative (since I don't know which way the meter would have been connected). After this test, neither parking brake will operate with the normal in car button. I located all 3 fuses associated with the parking brake circuit, and tested them - of course they are fine.

Without a wiring diagram, I am at a loss. Anyone have any suggestions? I am likely to have to tap out and take the car to the dealer. Has anyone experienced this same issue and what was the fix?
 

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Hi John, and welcome to SLKWorld.com from the UK Midlands - Thanks for joining us! :)

I can't help with your question, but hopefully other members will be along shortly with some useful advice for you...

In the meantime, please update your location and vehicle (year?: 1996-2016, model?: 32, 200, 230, 250, 280, 300, 320, 350, 55) in your profile if you haven’t already done so, as it helps the members answer your questions which usually are based on that information.
Follow this to update: ‘User CP’ at the top of page, then ‘edit your details’ on the left side, ‘additional information’ near the bottom, edit your ‘location’ and ‘vehicle’ (and then click ‘SAVE CHANGES’ button at the bottom of the page). Info in your garage does not update your profile.


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Thank you
Dave
 

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**Registered 2009 SLK200
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New member here. I installed new brake pads & rotors on my 2013 SLK250. Afterward, one of the parking brakes would not operate, and in the center display was a RED Parking Brake - See Owners Manual message. For the one brake which was working, it worked as usual. So, I replaced the electric drive/motor on the other brake, still the same issue. I could apply a 12 volt power source to the electric motors one at a time, get them to turn one direction, then reversing polarity, they turn the other direction. When on the caliper, they would clamp the rotor and release the rotor. But that one side would not function from the normal means. I took it to the dealer, and they suggested replacing the one caliper. Not sure what that would do since the motor works, the caliper works, they just don't work from the switch in the car.

So, I put 2 voltmeters on the real brake connector and actuated the parking brake switch. Neither volt meter indicated voltage, not positive or negative (since I don't know which way the meter would have been connected). After this test, neither parking brake will operate with the normal in car button. I located all 3 fuses associated with the parking brake circuit, and tested them - of course they are fine.

Without a wiring diagram, I am at a loss. Anyone have any suggestions? I am likely to have to tap out and take the car to the dealer. Has anyone experienced this same issue and what was the fix?
Did you not tell the car you have fitted new rear brakes on car so it will callibrate the electonic side of the handbrake ?

As in put it on a diagnostic machine ??
Im 99% certain they need to be reset calibrated like most modern elec handbrake .
 

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