replace oil pump on 2001 Mercedes-Benz SLK320

need detailed instructions on replacing oil pump. and should I replace the chain while I'm at it?

Asked by for the 2001 Mercedes-Benz SLK320
Could you tell us the reason to replace the oil pump??
What are the symptoms ?

Refer to original question please.
Change the chain.
You can find great repair manuals with step-by-step instructions, diagrams, parts locations and other important information here:
Good luck!