1990 200e air conditioning

[Spore_200E]

I have a 1990 200e class. Everything about it works great except the air conditioning. I live in Singapore, so aircon is a big deal. Currently, the aircon will only blow cool air when I am driving on an expressway. On surface streets, in stop and go traffic, it just blows hot moist air.

Is this a problem with the 200e that I will have to live with, or does it mean the air conditioning system is poor?

If it means the aircon is defective, can the system be replaced?

 

[turbopete]

id get the system checked out by an aircon specialist. it may need re gassed and nothing else, but id advise a leak check first, to be sure everything is ok and any seals etc replaced if necessary before re gassing