Use a flathead screwdriver to flick the handbrake gaitor from the centre console. Prise it up gently from the side to the front and the rear part just lifts up. When u look from above on the left side of the handbrake there is a metal clip on the thread adjuster. Again prise this off and adjust 10mm nut with a deep socket to tighten cable to suit 2-3 clicks.Make sure car still rolls when handbrake off and reassemble. 10 min job.
Ex BMW Mechanic., May 2008