Mercedes-Benz W221 S-Class (2005–2013): Night Vision, Hybrids and the Digital Cabin

The Mercedes-Benz W221 S-Class, built from 2005 to 2013, turned the flagship into a rolling showcase of sensors. It introduced Night View Assist (an infrared camera that sees beyond the headlights), Pre-Safe Brake, stop-and-go Distronic Plus, a Split View display and — in 2009 — the S 400 Hybrid, among the first production cars to use a lithium-ion battery. It also restored the S-Class reputation for quality after the uneven W220.

W221 at a glance

Design: muscle and presence

The W221 was more assertive than its predecessor, with pronounced wheel arches, a tall grille and a wide, horizontal dashboard. Inside, the column-mounted gear selector freed up space in the center console for the new COMAND rotary controller, and materials took a clear step up from the W220.

Seeing in the dark: Night View Assist

Night View Assist used an infrared system to show a black-and-white image of the road ahead on the instrument display, revealing pedestrians, cyclists and animals well beyond the reach of the low beams. Later versions could highlight pedestrians automatically. It was one of the first night-vision systems offered on a production car, and the concept spread across the luxury segment.

Braking before the driver does

Building on Pre-Safe, the W221 added Pre-Safe Brake. Using radar, the car could warn the driver of an imminent rear-end collision and, if the driver did not react, apply partial and then full braking automatically. Combined with Distronic Plus — adaptive cruise that could bring the car to a complete stop and pull away again — it laid the groundwork for the automatic emergency braking systems now standard on most new cars.

Blind Spot Assist, Lane Keeping Assist and adaptive high beams were added during the W221’s life.

Split View

The 2009 update introduced Split View, a central screen that showed different images depending on the viewing angle. The driver could see navigation while the front passenger watched a video on the same display — a clever solution to distraction rules.

The first lithium-ion S-Class

The S 400 Hybrid (2009) paired a V6 with a small electric motor and a compact lithium-ion battery. It was a mild hybrid by today’s standards, but it made the S-Class one of the first production cars to use lithium-ion hybrid technology. Efficient BlueTEC diesels were offered too, including in North America.

In chauffeur service

The W221 became a familiar sight outside hotels and airports around the world. Its long-wheelbase body, quiet cabin and durable powertrains made it a natural chauffeur car, and many are still in service in some markets.

Before and after

The W221 replaced the W220 and was succeeded in 2013 by the W222, which learned to read the road. Read the full story in our S-Class history.