How many bottles of refrigerant a volvo s80 takes?

That's a REAL GOOD question! The factory refrigerant charge specifications for your vehicle is 2.20 Lbs. of R-134A. Freon R-134A comes in 12 oz, 14 oz, 16 oz, 19 oz, and 22 oz cans (as well as 30 Lb Cylinders) - it depends on which brand/size can you are buying, whether your system is COMPLETLY out of freon, or whether it still has some freon in it.

The best way to deal with the situation (in my opinion) if you are going to try and charge you own A/C system is to purchase a kit that comes with a gauge. A company called interdynamics has a real good kit available that comes with a reusable gauge. Once you have the gauge, all you have to purchase in the future is the freon itself. By using the gauge, you can more accurately charge your system without the worry of possibly overcharging. (Overcharging can cause extremely high pressures that can do serious damage to your vehicle or cause personal injury.)

Anyway, this kit is available at O'Reilly's as well as other auto parts retailers. Here is a direct link to see the kit at O'reill'ys web site.

There is also a whole bunch of instructional videos on how to charge your system at the interdynamics web site. CLICK HERE