The part in detail:

Part A2044010302 , 7-Twin-Spoke Light-Alloy Wheel

Type:7-Twin-Spoke Light-Alloy Wheel

8.5J x 17 ET 58 245/40

MB 7-twin-spoke light-alloy wheel 8,5J x 17 ET 58 (245/40 R17) 

C-class / W 204 (03/07 - )
C-class / S 204 (12/07 - ) 

245/40 R 17 ON 8.5J X 17 ET 58
FINISH:TITANIUM SILVER
OPTIONAL EXTRA FOR ALL LINES
NOT FOR C63 AMG, NOT FOR 4MATIC WITH MIXED -SIZED TYRES
NOT SUITABLE FOR SNOW CHAINS
REAR AXLE ONLY
DOES NOT COME WITH TYRES.

Price: £211.20