XYZ Racing Hollow Rear Brake Kit — Mercedes Benz B CLASS W246 4 (2012-2018)

The W246 B Class was built to carry people and luggage, not to chase an apex, and its factory rear brakes reflect that brief: modest discs sized for a front-biased family tourer. The XYZ Racing Hollow Rear Brake Kit goes straight at the back axle, adding clamping force and thermal headroom exactly where the standard setup runs short under repeated heavy stops.

Mercedes Benz built the B Class W246 4 on the tall MFA platform with a nose-heavy balance, so the front brakes shoulder most of the work and the rears are often left underused. This rear big brake kit rebalances that, giving the chassis more authority on turn-in and under trail braking when the car is loaded. It is a single-axle package: a matched pair of rear calipers and discs, supplied with the mounting hardware to bolt onto the back of the W246.

What this brake kit does for your 2012-2018 Mercedes Benz B Class W246 4

Fit the kit and the first thing you feel is a firmer, more progressive rear bite that lets you brake later into a roundabout or a downhill bend without the nose diving as hard. Each two-piece floating disc pairs a forged hat with a hollow-vane friction ring, so the rotor carries the heat of a hard stop while trimming rotating and unsprung mass at the back axle. That keeps the wheels responding cleanly to braking and to bumps. Three pad compounds let you match the rear to how you actually drive the B Class: Street is the quiet, low-dust road default, Sport adds bite and a wider heat range for fast road and the occasional track day, and Racing is the full track compound. On a fully laden W246, that extra rear thermal capacity is what keeps pedal feel honest on a long descent instead of going soft halfway down.

About the Hollow rear brake kit

XYZ Racing’s Hollow rear kit is named for its lightweight disc, where the vanes are hollowed to cut rotating mass without giving up swept area. The calipers are hollow-body as standard, and a Hollow Racing upgrade is available for serious track use: it drops the dust cover, is rated to 1000C and carries a two-year warranty. The package pairs the discs with calipers finished in your choice of Red, Yellow, Gold, Black or Anodized Black at no extra cost, with a Custom Color in any Pantone shade for £150 more. Premium polished-forged finishes in Titanium, Polished Gold and Polished Silver are available too, alongside candy finishes in Teal, Blue, Red and Orange. Discs come drilled or slotted at the same price, and two-tone centre bells in five anodized colours or titanium can be selected when you order. The aim is plain: more consistent rear braking, better heat management and a back axle that finally pulls its weight under hard use.

Fitment for the Mercedes Benz B Class W246 4 (2012-2018)

This kit is cut for the Mercedes Benz B Class W246 chassis across the 2012 to 2018 model years, and fits the rear axle specifically. Check your exact variant against the W246 4 designation, then use the options above to choose caliper finish, pad compound and disc style to suit.

What buyers also search for

• Mercedes Benz B Class W246 rear brake upgrade for loaded and fast-road driving
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• Hollow-vane rear discs to cut rotating mass on the 2012-2018 B Class
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• W246 brake caliper colour options including red, yellow, gold and black

Pick your caliper finish, pad compound and disc style for the W246 B Class, and the configurator above will build your rear kit.