With the 480 ES, Volvo set out to produce a car which 'radiates dynamic appeal and gives exceptional levels of driving pleasure'! William Woollard discovers whether they've succeeded. Sue Baker and Russell Bray take to the hills, wrestling with a range of all-terrain vehicles, undaunted by forests, hills, axle-deep mud and water. And Top Gear looks at two developments in safety: the air bag and a device to reduce fire risk.