You can check this with a garage - part number is A2019972281. Used for the star logo on the boot.
Mercedes-Benz Genuine Boot Parts Kit Steering Fits GL-Class X164 W164 V251 W251
Mercedes-Benz Genuine Boot Steering Gear Fits CLS E-Class SLC SLK A2034630396
NEW Genuine Mercedes-Benz REAR Axle Diff Differential Oil 1 Litre A001989330309
Genuine Mercedes-Benz REAR Axle Diff Differential Oil 1 Litre A000989730411PDNW
Genuine Mercedes-Benz Rear Suspension Camber Arm Bolt Adjustment Kit ZBOLT
NEW Genuine Mercedes-Benz REAR Suspension Camber Strut Fitting Kit A2103504506