put the car on stands and remove the rear roadwheels. in each hub at the
back is a hole, through which you can put a screwdriver or similar to turn
the small toothed wheel that adjusts the parking brake pads. turn the
toothed wheel until the roadwheel cannot rotate, then back off a notch or
two. do the same with the other side. you can then take up any slack in
the cable by turning the adjusting nut on the cable at the point where it
divides to send a cable to each rear hub.
I know on the W115 body style, if you jack up the rear wheels and undo
one of the lug bolts on each rear wheel, you can rotate the wheels
such that you see a star wheel. By rotating those star wheels with a
flathead screwdriver, you adjust the tightness of the parking brake
shoes on the wheels. Also, in the middle of the car, just above the
differential, there's a screw that adjusts the length between the two
parking brake cables.
But it could be WAY different on the 201's. These 115's are very
simple machines for DIY adjustments.
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