Electrical quirks: window regulators, rear-door wire break, and the harness question

Common electrical faults include broken plastic window regulator guides and a wire that fatigues and breaks where it crosses from the B-pillar into the door, disabling rear windows. Owners also debate whether the W201 escaped the biodegradable wiring harness that plagued other Mercedes of the era; the prevailing view is that this chassis was not affected.