The W121 unibody is widely acknowledged as rust-prone, with buyers focusing inspection on the undercarriage, spare-tire well weep holes, rocker panels and floor pans. Repair is expensive but survivable — dry-ice blasting is cited as a fix — and dry Southwest/California cars command a premium for solid metal.
Rust: undercarriage, spare-tire wells, rockers and floor pans
Mercedes-Benz 190SL (W121) · buying