A good condenser and radiator fin cleaning really helps. In my late 124 (R134 from factory), I could see light being passed through fins of both heat exchangers but I could also see fluff stuck to the condenser fins.

I cleaned it out with regular home depot evaporator coil cleaner after removing the front fans and the radiator too, It really helped in A/C performance.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)