Hi,
You can just get the central bearing and it's mounting as a spare Part and just replace that on its own.

Matt
I did it myself but I'm used to working on cars. I will try and dig out the part number, I think it was from a MB parts supplier here in the UK.

Got it from here.
www.partsformercedes-benz.com
1 x Mercedes CLK 1997-2002 Propshaft Centre Repair Kit (PFM902613) = £18.00