Hi guys, I have 1.2 active petrol punto. have driven over 45k now in 2.5 years. recently, i am having some problem in a/c. i get some bad smell - its not coming continuously but say 3-5 mins in 15-20 mins of period. i showed it to couple of local mechanics. one said that it could be because some dust might have jammed in a/c vents. he told me that entire system will have to be opened and cleaned up which would cost 3k including refill of gas. another told me to take to TASS. any idea whats wrong?