THE C5 dash is an architectural delight with its organic, sweeping curves and (in the V6 model) a woodgrain insert containing air vents, radio and climate-control functions in the centre console. The instrument binnacle sweeps across the dash to intersect with the curving, moulded rib on the passenger's side. The gauges include an engine oil temperature gauge to the right of the tachometer and, in the V6 model, the driver can also detect whether the tyres are inflated at the correct pressure.