There are tons of threads regarding forum members who rolled in their own timing chains.
I'm not looking forward to doing one, but probably will when the dreaded head gasket finally gives out.
Some special tools are required such as the crimp used to fasten the link onto the new chain, but I believe the most difficult part of the job is patience.
Go too fast or get careless, and you will wind up having to dismantle more of the engine than you care to...
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car