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      12-11-2013, 06:51 PM   #1
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Lightbulb Race driver Bruno Spengler presents the all-new BMW M3 and M4

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When developing the new BMW M3 Sedan and new BMW M4 Coupe, the BMW M engineers could count not only on track-honed technologies, but also on the driving talent of experienced racers. For example, Bruno Spengler, BMW Motorsport work drivers in the DTM Deutsche Tourenwagen Masters (German Touring Car Masters) series, took part in extensive testing and set-up runs on the Nürburgring-Nordschleife circuit.

“I’m proud to have made a contribution to the set-up work on these two cars,” says 2012 DTM champion Spengler, who also took third place in the 2013 series.

Bruno Spengler adds:

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“The suspension has a very sporty set-up, the feedback from the front axle is extremely direct."

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"The grip at the rear axle is phenomenal and the engine performance is awesome. This is the ideal basis for our DTM car.”

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“As a race driver, I’m very impressed by the instant, lag-free response from the two turbos as soon you step on the gas."

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"This is a sensational feature of this engine which translates to more fun at the wheel and is perfect for sporty driving.”

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“The electronic power steering is very precise, and from my point of view as a race driver that’s very, very important. It responds instantly to inputs and provides excellent feedback.”

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„“The rear axle has a very progressive locking action, due to the electronically controlled limited-slip differential, and generates huge amounts of grip..”

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“ The electronic control system is configured so that when you lift off the gas going into corners, the differential opens up and the lock-up effect is reduced to zero, resulting in very eager turn-in."

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" When you accelerate out of the corner again, the lock-up engages progressively all the way up to 100 per cent full lock, for optimal traction.”

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