2020 Mercedes-Benz S450L Service and Repair Manual

This factory service and repair manual for the 2020 Mercedes-Benz S450L applies to the Biturbo, the only trim listed, and to its sole body, a four-door sedan. Under the hood is a turbocharged gasoline 3.0L V6 with dual overhead cams. The manual pairs that engine's fuel, cooling and boost systems with the transmission, chassis, restraint systems and the sedan's electrical architecture, giving specifications for this model year.

Engines covered

• 3.0L V6 — DOHC, turbocharged, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Biturbo

Known issues on the 2020 S450L. Five recalls are recorded for the 2020 S450L. On certain vehicles, connectors on the side crash sensors could work loose, slowing air bag and seat belt response in a side impact; dealers checked and replaced sensors. Certain cars had SIM card software in the communication module that could lose its mobile network link and disable emergency calling, fixed by an update. Where a panoramic sunroof is fitted, certain cars could lose the front roof panel if it had been poorly bonded during an earlier repair. Four complaints name this sedan, citing speed control, wipers and the fuel and propulsion system. Restraint, telematics and body procedures, wiring diagrams and diagnostics apply.