It's finally time for the return of the CSL badge, one that has only been worn twice before. Enter the BMW M4 CSL: 100kg lighter and 39bhp more than a standard M4, with added ducktail spoiler reminiscent of its E46 cousin. Top Gear Magazine's Ollie Marriage is joined by BMW M's Head of Engineering Dirk Hacker for a look around the £125,900 track weapon, BMW's fastest production car to ever lap the Nürburgring...

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Chapters:
0:00-0:52 Intro
0:53-1:21 CSL vs GTS Badge
1:22-4:27 Q+A with Dirk Haker
4:28-5:47 Weight Saving
5:48-6:15 Engine
6:16-6:35 Startup and Sound
6:36-6:50 Gearbox
6:51-7:16 Grille and New M Badge
7:17-7:44 Wheels and Brakes
7:45-8:22 Aero and Ducktail Spoiler
8:23-10:08 M Cars History Lesson
10:09-10:56 Outro

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