I have a 91 560SEL and the condenser started leaking...can that be repaired or should I look for a replacement?

Take it to a radiator shop and show them where it is leaking. Sometimes they can fix them and sometimes not. If they can't they usually have a good source for replacement units. If they don't, click on Fastlane at the top of this page and Phil can get you one for a reasonable price.

Good luck,