Much has been made of Mercedes new 'coanda-effect' exhaust. Craig Scarborough explains what it is, how it works and what difference it will make to the Three-Pointed Star's flagging 2012 campaign

Since its early-season spike in form, Mercedes has slid from competitiveness.

Outwardly, the car remains much as it appeared at the start of the year, but following a successful three-day test at Magny-Cours, the team arrived in Singapore with some new upgrades ready to race, most notably the revised exhaust system and sidepod set-up.

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