This is a weird one. My '80 300SD brakes perfecly 99.9% of the time. But, if I'm backing into a tight spot to parallel park (most spots are tight in an SD), my brakes fade almost completely, giving me quite a scare as I nudge the guy behind me. Anybody had any similar experience? Am I pinching a line somewhere or what? Once I pull back out onto the road, my brakes return to normal immediately. What the hey!?

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1980 300SD (The Green Machine!)
180D Ponton (paid $100 Cdn - sold $200!)