I remember doing my 1984 500sl water pump. It's kind of funny, I had my a.c. compressor go out about a year before the water pump, when I looked into replacing the compressor and saw the amount of work I said I will wait till the water pump goes out... well it also went out, I did not have to remove the counter balance, but everything else had to come off. The complete front of the motor, radiator, fan, shroud, distributor all had to come out and when it was, the a.c. compressor was there so i replaced it too. But that is another story. Good luck it's not a hard job, I would just say think about any other things that could use to be replaced and do it all then.