drive belt

I'm trying to replace the serpentine drive belt on e320cdi estate but am not sure of the belt route and find access difficult. Also cannot remove fan. can anyone help?

Hi! I'm helping my friend with his CLK200 (C208, M111.943 engine) following failure of his exhaust manifold! My friend got one of his local friendly moles to weld back the broken neck of the manifold - it's the 'coaxial' short-neck aluminium one - they ALL crack!!! I've got all the bottom...