The condenser never played a part of the ignition on those point triggered transistor ignitions.
The big problem with that ignition was that there was so little current flowing through the points that they easily fouled. They often came fouled (the slightest oil vapor could insulate them). You should make sure the points are closed and grind the two contacts into one another. Possibly draw a clean piece of paper through them and again grind them together.
During the years these cars were in warrantee the blueing that occured on the points was a real problem; MB tried a number of solutions including the instructions to cut the wires to the condenser. It didn't help but the condenser was of no use anyway.
Bosch Master, ASE Master, L1
33 years MB technician