Push Start Stop Button Replacement for Mercedes R-Class W251 (2006 to 2012)

Push Start/Stop Button Replacement for Mercedes R-Class W251 (2006–2012)

The R-Class W251 was Mercedes-Benz's long-wheelbase grand tourer for large families — six seats, elevated ride height, and a cabin designed for extended journeys in comfort. For vehicles produced from 2010 onward, the KEYLESS-GO push-button start became part of that comfort package. In a vehicle used daily for family transport, the start button accumulates presses faster than in most segments — multiple drivers, frequent short trips, school runs — and the factory button surface reflects years of that use.

This replacement button unit fits the W251 directly and returns the switch to its original appearance.

Looking to upgrade the interior of your car? Also visit the Mercedes section of our aftermarket parts shop.

Compatible Mercedes Models

Mercedes-Benz R-Class (W251) – 2006 to 2012

Mercedes-Benz R 350 (W251) – 2006 to 2012

Fits W251 vehicles equipped with factory KEYLESS-GO push-button start. Verify your button style against the product images before ordering.

Family Vehicle Wear Patterns

The W251 is routinely used by more than one driver — partners, family members, occasionally teenage children. Multiple users mean multiple hand sizes and grip styles, which distributes wear across the button face more evenly but also accelerates the pace at which the chrome ring collects small scratches and the cap surface loses its original finish. A vehicle that has seen a decade of family use will show clear wear on this component.

What the Replacement Covers

The full outer assembly: button cap, chrome bezel, and retention system. Pre-assembled and ready to install. The original wiring harness connector plugs straight in — no electrical modification required.

Installation

Remove the old button by releasing the rear retention mechanism and unplugging the connector. Press the replacement into position, reconnect the plug, and test ignition. Estimated time: 10 to 15 minutes. No console disassembly required.

Why This Replacement Is Worth It

Complete switch unit — cap, chrome ring, and mounting hardware included

Directly addresses the most worn interior touchpoint on a high-use family SUV

No system recoding after installation — KEYLESS-GO operates normally

Cost-effective alternative to a Mercedes dealer part

Explore all parts and accessories for Mercedes, browse our full range of replacement interior buttons and controls, and discover more in our interior trims collection.

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