Mercedes-Benz · S123 · 1977-1986

S123 Guides

Focus on service history and rust inspection as these vehicles are now 40+ years old and susceptibility to corrosion is a primary concern. Look for complete documentation, matching numbers, and original interior trim as these factors significantly impact value and authenticity.

IssueSeverityNotes
Rust in floor pans and rear panelsHighRegular inspection and preventive maintenance essential
Heater control valve failureMediumCommon wear item requiring replacement
Suspension bushing degradationMediumAge-related wear affecting ride quality