2003 Mercedes-Benz ML350 Service and Repair Manual

This factory service and repair manual for the 2003 Mercedes-Benz ML350 covers a four-door sport utility sold in a single Base trim. Power comes from a single-overhead-cam 3.7L V6 that breathes without a turbocharger or supercharger and runs on gasoline. The manual carries the specifications, torque values and wiring diagrams for that engine and for the steering, seats and electrical system around it.

Engines covered

• 3.7L V6 — SOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sport utility

Trims covered

• Base

Known issues on the 2003 ML350. NHTSA lists three recalls against the 2003 M-Class line. One covered certain 2003 M-Class AMG vehicles, where pressing the brake pedal might fail to cancel cruise control though the stalk and the other methods still worked; two covered certain vehicles whose power steering cooler hose clamp could grip too loosely, letting fluid escape until assist faded and the pump was damaged. Owners lodged 24 complaints about the 2003 ML350 itself, most often on steering (10) and seats (7); 4 complaints reported a fire and 2 reported an injury. The 2003 M-Class line drew 9 more, led by the electrical system. Steering, cruise control and electrical procedures, wiring diagrams and diagnostics are covered here.