A 300-hp high-performance model highlights 2004 additions to Volvo's best-selling line. The S60 is the sedan variant of Volvo's V70 wagon. All S60s use an inline 5-cyl engine and all but the 168-hp base model are turbocharged. The 2.5T models have 208 hp, the T5 has 247. And the new S60 R has 300. The 2.5T AWD and the R have all-wheel drive. Other S60s have front-wheel drive. Base, T5, and R come with manual transmission--a 5-speed on base and T5, a 6-speed on the R. A 5-speed automatic is standard on the 2.5T models and optional on the others. Wheel diameter ranges from 15 inches on the base model to optional 18s on the R. Front side airbags, head-protecting curtain side airbags, traction control, and antilock 4-wheel disc brakes are standard. An antiskid system is standard on T5 and R, optional for other S60s. The R's suspension has three driver-selectable settings to emphasize ride or handling. Optional on all is a navigation system with pop-up dashboard screen. Among '04 changes, the standard remote locking system uses an integrated key transmitter, and cabin appearance is revised with charcoal-colored trim and watch-bezel-style instrument surrounds. All S60s are available with Volvo's On-Call Plus assistance system.