I may be wrong here( And probably am ) so if any owners put me right that's no bother...but are they "coded" to the car or not? I know mu Hu601 is..or so I've been told. Just in case they are and you waste some cash .
Just checked this on E bay and it reckons it will fit straight in,no codes needed.
http://www.ebay.co.uk/itm/Volvo-S60-...11017011420%26