How do you connect an iPOD to a Volvo S40 radio?

Solution 1. The easiest fix is an adaptor with a cassette to 3.5 mm jack. You can get these from Tesco and Halford. They cost about £10 and plug into the headphones socket in the iPod and slides into the cassette deck on the car stereo. Solution 2. The alternative is the iPod FM transmitter. These plug into the iPod and transmit what ever is playing on a lower power FM frequency that you can tune in any FM radio to receive. These can be priced from £10 - £30 - you can get these on eBay - either Apple branded or generic. Quality is variable