One other thing to check is that the speaker grille is on properly. When they get loose they can hit the B-pillar and simultaneously make the door hard to close, bend up the grille, and tear your B-pillar covering (time has probably done that for you already).

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition