Used Mercedes-Benz ML Brake Master Cylinder

Yes, every variant of the Mercedes-Benz ML is fitted with a brake master cylinder — it is a fundamental hydraulic component present on all petrol and diesel versions across all generations. The ML is a conventional hydraulic braking system vehicle, so this is a standard part you can legitimately search for from a breaker.

The W163 and W164 are entirely separate generations with different braking system architectures, so a master cylinder from a W163 is very unlikely to be a direct fit on a W164. You should always source a master cylinder matched to the correct generation — confirm the part number with the breaker against your registration plate before purchasing.

Yes, engine size can matter for the ML because larger, heavier engines often correspond to uprated braking systems with different master cylinder bore sizes. When contacting a breaker, give them your exact engine variant — for example 270 CDI, 350, or 63 AMG — alongside your registration so they can match the correct unit.

The W164 and W166 are different generations, so fitment across that 2011 boundary is not straightforward and you should not assume parts interchange. Give the breaker both the year of the donor vehicle and your own registration, and let them verify compatibility before you commit to buying.

Trim level alone does not determine which brake master cylinder you need on the ML — what matters is the generation and engine size, not whether the car is badged SE, Sport, or AMG Line. Bear in mind that AMG variants with significantly larger engines may carry a different unit, so still confirm the engine size with the breaker rather than relying on trim name alone.

Both years sit within the W164 generation (2005–2011), so there is a reasonable chance of compatibility, but mid-generation brake system changes cannot be ruled out without checking part numbers. Ask the breaker to cross-reference both part numbers against your registration before agreeing to the sale.