1997 Mercedes-Benz S320 Service and Repair Manual

This factory service and repair manual for the 1997 Mercedes-Benz S320 covers a gasoline 3.2L inline-six sedan offered in two trims, the LWB and the SWB. Its engine is naturally aspirated with a DOHC valvetrain, and no body other than the four-door sedan is listed. The trims split on wheelbase and not on engine, and the manual covers that powertrain along with brakes, steering and lighting.

Engines covered

• 3.2L inline-six — DOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sedan

Trims covered

• LWB
• SWB

Known issues on the 1997 S320. NHTSA filed one recall against certain 1997 W140-chassis models. At full steering lock a front wheel could rub the brake hose, and a damaged hose could leak fluid from the front circuit, lengthening stops. The remedy was a hose inspection plus a bracket to hold the line clear of the wheel. Five complaints name the 1997 S320, spread across exterior lighting, electrical faults and the power train; NHTSA logged two complaints against the 1997 S-Class line, both electrical. Brake hose routing, steering, lighting and transmission work each draw on the manual's step-by-step procedures, torque values, diagnostics and wiring diagrams.