Gulfstream Aa-5- Aa-5a,cheetah Aa-5b. Tiger Parts Manual on 2040-parts.com

One lap of the Web: Ponycar birthdays, forgotten Hungarian racetracks and an Acura NSX

Chevy took some time this week to say happy birthday to its archrival, the Ford Mustang. The bowtie brand said that "healthy competition" between the Camaro and Mustang has been a "driving force for constant improvement." Check it out over at World Car Fans. Petrolicious has a handful of photos from a nearly forgotten track in Budapest, Hungary.

July 17: A mystery and a helping hand

Driving very conservatively, at about 55 mph, I made it the 76.3 kms (47.3 miles) using only 9 kWh. That's 5.25 miles per kWh. That's also 8.5 kms per kWh.

Mercedes E-class Cabriolet at Detroit motor show 2010

Here's our first look at the new Mercedes E-class Cabriolet, unveiled at the 2010 Detroit Auto show. It's the fourth addition to the E-class range, and as with the latest E-class Coupe, the new drop-top replaces the old CLK. The new E-class Cabriolet shuns a hard-top and continues to favour the more traditional folding fabric arrangement - the hood can be opened or closed in 20 seconds at speeds of up to 25mph.