The part in detail:

Part B66848438 , ALU STYLE SWIVE

Type:ALU STYLE SWIVE

Two ski racks can be fitted per pair of basic carrier bars, each capable of holding three pairs of skis plus sticks. An ingeniously simple tilt-down mechanism makes loading and unloading the rack significantly The tilt-down module is available as a spare part under B6 684 8439 "Suitable for all Alustyle basic carrier bars. Specifically designed for relatively high vehicles such as the A-Class, the M-Class and the G-Class. Easy to load and unload thanks to tilt-down module (spare part number B6 684 8439). Open and pull out the lock handles on the basic carrier bars and the ski rack can be tilted down from the roof. Depending on the maximum roof load, up to 2 pairs of ski racks can be fitted. Locked using rotating end caps on ski rack. Theft-proofing courtesy of lock on basic carrier bar. For a max. of 3 pairs of skis plus sticks; weight, incl. tilt-down module: 3.4 kg; extends outwards by 258 mm; simple for the customer to fit"

Price: £124.09