I would also replace the reservoir. I have had a couple of situations where I installed a new master cylinder only to find that the seals on the reservoir leaked when I put the power bleeder on. And chances are, that no matter how careful you are, you will break one of the the bottom fittings removing it from the master cylinder.

In any case, replace the seals between the master and the reservoir.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe