MY SC 430 stinks of rottne eggs and castor oil- HELP
 

The ventilation sytem in our car started smelling like rotten eggs every time we used it for any function. Took it into the delaer and the repair tech said, common issue with SC 430s, see it all the time. Air con drips water into a tank, tank forms mold =bad smell. Rep said they can put something called MIST into the sytem , clean the filters and the bad smell will go away. Ok.
Now the car smells like castor oil every time we use any ventilation functions.
Dealer now says, this is unique to my car, never heard of bad smells coming from any SC 430 and the part about mold in the air con, never heard of. Previous guy no longer works there. They will MIST again but the bad smell is now my problem.

HELP, anyone have any suggestions. ventilation