1994 Mercedes-Benz S420 Service and Repair Manual

This factory service and repair manual for the 1994 Mercedes-Benz S420 covers the V8 sedan: a 4.2L eight-cylinder with double overhead cams, naturally aspirated and running on gasoline, in a four-door body and a single Base trim. Ignition, fuel and cooling service for the V8 is covered with its engine mechanical data, along with the transmission, the brakes and suspension, steering, and the electrical systems of the car.

Engines covered

• 4.2L V8 — DOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base

Known issues on the 1994 S420. Owners filed one complaint about the 1994 S420, and it concerns the electrical system. That lines up with the 12 complaints NHTSA logged against the wider 1994 S-Class line, each involving electrical faults, with a single mention of the suspension. For this sedan the wiring diagrams and diagnostic routines are the most useful tools in the book, backed by suspension procedures, specifications and torque values and by coverage of the components those circuits control.