My 95 C280 was bought used from MBZ dealer, and all was fine except this strange smell from the vents. The smell goes away if I have the a/c or the heater on. If I have the climate control on EC for regular ventilation, it starts to smell like ammonia (my wife thinks smells like vinegar). Any ideas? Should I change the dust/pollen filter and/or do the lysol magic from the fresh air intake? Your help would be greatly appreciated.
Menlo Park, CA
1983 Porsche 944