Well today I tackled this job... What a PITA.
I had 12' of stretch before, now i'm looking at around 2'.
Threading the new chain on was a piece of cake, but doing the upper guide rails was tricky to say the least.
People recommend to have a helper to do the chain, I can imagine they would have only gotten in the way. Its an easy 1 man job. Taking the plugs out, air filter housing and valve cover off probably took more time than doing the actual chain.
While I was in there I did the oil feed tube plastics too. They were all still in one piece, but were pretty loose fitting on the tube.
I havent finished completely yet, still need to throw on the valve covers, PS pump and air filter. It started to rain, so I had to pack up!

Regards

__________________
Ben

'85 500 SEL
'85 928S2
'88 560 SEC
'90 750i