Mercedes-Benz W204 parking brake adjustment
Mercedes-Benz W204: how is the parking brake adjusted?
The adjustment is reached through the rear seat. The front edge of the seat is lifted and the seat is moved back, which frees the hooks at the rear edge so the seat can be pulled out. The facelift had no adjustment hatch. The brakes are safety-critical, so have a workshop check the result of the work.
Mercedes-Benz S204: how is the parking brake adjusted when there is no automatic tensioner?
Both sides are tightened until the brake cannot be turned by hand. After that both are loosened by eight teeth according to the manufacturer's service instructions. The parking brake is safety-critical, so a workshop must check the adjustment.
Mercedes-Benz W204: why do the parking brake shoes not fit in the drum, or why is there a grinding noise from the rear brake?
A new shoe can be slightly bent, in which case burrs in the stopper slots or a small excess have to be ground off. The grinding can be caused by a rusted through-hole in the backing plate where the hook spring does not stay in place. After the repair the brakes must be inspected at a workshop.