Whoop-whoop. Whoop-whoop. What the heck is that strange noise coming from behind the firewall? And the climate control system sometimes exhibited a strange cyclical wheezing. Over bumps with the top up, there are lots of creaks and rattles, and granular paved surfaces deliver plenty of tire noise. Otherwise, the Volvo C70 is remarkably quiet with the top up, with just a little bit of wind noise coming from the windshield pillars and header. Top down, windows up, there's not much buffeting – just the top of your head gets tousled. A wind blocker is optional, installing behind the front seats but making the rear seat unusable. Additionally, handy clips hold the rear seatbelts in place to keep them from flapping in the wind when they're not in use.