Volvo Repair: bad smell from aircon, volvo dealer, cabin filter

Question
Just bought a new 2007 V70. After couple days driving, bad smell comes out when turn on air-con. Any suggestion?

Answer
try to change cabin filter  also afterblow function maybe turned off you have to program that by Volvo dealer the function  is to dry any moisture from evaporator and vents when the car is off   is it will start blower fan at full automatic and turn off after 15  it hard to notice when it comes on  but the feature  is the to reduce odor  it can be checked with Volvo scan tool if is on or off