Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

BMW 5-series is in line for the company's new triturbo diesel engine

Details leaked from a dealer conference held in Holland this week suggest that BMW's upcoming 550dX will be the first recipient of the German carmaker's new high-tech triturbo 3.0-liter inline six-cylinder diesel engine. The new engine, which also is destined for the new X5 xDrive50d and X6 xDrive50d models, is claimed to produce 376 hp and more than 516 lb-ft of torque--some 70 hp and more than 74 lb-ft more than the most powerful version of BMW's existing twin-turbocharged 3.0-liter inline six-cylinder diesel engine, as found in the X5 xDrive40d. The radical new engine, which is rumored to use two traditional exhaust-blown turbochargers in combination with an electrically driven turbocharger to add low-end response, is planned to be offered exclusively with an eight-speed automatic gearbox and four-wheel drive.

New Mercedes A Class: Production increased to meet demand

With over 70,000 orders already in the pipeline for the new Mercedes A Class, Mercedes are increasing production to meet demand. The increase in production at Mercedes plant in Rastatt, Germany, means adding a third shift to effectively increase production by almost 50 per cent and make a dent in the 70k plus orders Mercedes already has for the new A Class. That’s in stark contrast to the recent news that Mercedes is having to slash production of the S Class as sales falter, partly due to a new S Class in the pipeline for 2013 but also because buyers are falling in love with more compact offerings.

LeMans winner Johnny O'Connell answers your driving questions

The guy's been racing professionally since 1987. He's won at LeMans four times. He's used to success, but this week he's an instructor at Bondurant, trying to make a halfway decent driver out of your humble editor.