1970-74 Challenger Exhaust Splitters on 2040-parts.com

Mercedes B-class (2012): the first look inside

Mercedes is giving its new small car range a much more modern cabin. This first official photo inside the new 2012 Merc B-class reveals a cockpit with distinctive round air vents from the SLK and a heavily stylised dashboard. We've been to Mercedes' Italian design studio to sit inside the new B-class and can report it's a much slicker affair inside.

CAR tech: how to eliminate turbo lag

CAR has tested a new breed of experimental super-diesel that literally leaves current technology standing and may banish turbo lag forever. We drove an Audi A6 3.0-litre V6 prototype fitted with an electric bi-turbo system which delivers a massive dose of torque from idle. The effect is radical, firing the saloon off the line like an R8 when the driver floors the throttle.

$4 gasoline fuels surge in March sales

It feels counterintuitive. Expensive gasoline not only helped propel new-vehicle sales in the first quarter. It was a key factor in the surge.