Uneven brake disk/pad wear W123

[Graham]

It seems I frequently have to replace pads and rotors on my 85 300D. Not because they are worn down too thin, but because they wear unevenly and the disks rust.

I just pulled my front pads to to pulsing when braking. Disks and pads were hardly worn. However, on driver side, contact surface shows as a narrow band compared with the passenger side.

Why would the pads have full contact and keep the disk contact surface clean on passenger side but not the driver side? Different wear from inside surface to outside too.

Please excuse the fuzzy pictures (taken in dark!) - but they do show the differences in wear.

Driver side:



Passenger Side



No sign of any leakage or other problems on calipers. Hard to see how they could apply more force in some areas than others.