Hi,
Wheel bearings for the C43 whether there front or rear are the same as any other W202.
Unless yours is rumbling I very much doubt it is worn out, just get it repacked with grease and the pre-load adjusted, I very much doubt it will need anything else.
A new front wheel bearing from Euro's is approx. £15, and should,nt take more than an hour to fit if you go for a new item.