Used Mercedes-Benz ML Brake Light Switch

The ML has run across distinct generations: the W163 (1997–2005) and the W164 (2005–2011), with the W166 following from 2011 onwards. These generations differ significantly in their pedal box and electrical architecture, so a brake light switch from a W163 is very unlikely to be a direct fit on a W164 or W166. Always confirm the exact generation against your registration with the breaker before ordering.

Yes, all variants of the Mercedes-Benz ML are fitted with a brake light switch – it sits on the brake pedal assembly and signals the brake lights and, on later models, the ABS and cruise control systems. This applies regardless of engine size or drivetrain, so whether you have a diesel or petrol ML you will need this part. It is a genuine part to source from a breaker.

Trim level – for example Sport, SE, or AMG Line on the W166 – does not affect the brake light switch, as it is part of the pedal assembly common across the range. Engine size is also unlikely to change the switch itself, since the pedal box is broadly shared across the ML's engine variants within the same generation. Focus on matching the generation (W163, W164, or W166) and confirm the exact part number with the breaker against your registration to be sure.

A 2009 ML falls in the W164 generation (2005–2011), while a 2012 ML sits in the W166 generation (2011 onwards), so these span a clear generational boundary. Parts from different generations are not reliably interchangeable due to changes in the pedal assembly and electrical connectors. Confirm with the breaker whether the specific switch from your donor vehicle will cross that W164-to-W166 boundary before purchasing.

The W164 received a facelift around 2008, and the W166 was updated during its production run, but the brake light switch sits on the pedal box rather than in areas typically revised by a facelift. In most cases the switch will be the same before and after a facelift within the same generation, but whether a specific pre-facelift switch swaps directly onto a post-facelift car is worth confirming with the breaker against your exact registration to be certain.

The brake light switch is mounted on the pedal assembly and is not typically determined by engine size within the same generation, so an ML300 and ML350 of the same generation are likely to share the same switch. That said, you should always quote your registration and the donor vehicle's registration to the breaker so they can verify the part numbers match before you commit to buying.