Mini R53 How to adjust the park brake one the caliper?
I am having a problem as the left side is not engaging.

 

More that likely that brake cable is rusted. Time to replace both cables.

 

Yes, I had one stick and the other one I got by with hosing down the inside of the cable with free-all (penetrating oil). But after time the salt around here beats them up. I did mine in pairs new . I spray a little oil under the boots with the new ones to extend their life. 34406769955

https://www.northamericanmotoring.co...r-caliper.html