You will need:
complete steering column from a power steering 230SL
power steering box
pump with bracket and belt tightener
crank shaft pulley and drive belt
fluid canister and longer timing chain hold down screw
hoses that go from the pump to the box
hose from pump to fluid canister
Some hardware will be different ( longer ) and you should change the plastic bushings in the steering coupling.
A week to take it all apart and put it back together. The steering column will be the hardest to find.