Here it is, the ultimate posh saloon group test! The A6, 5 Series and E-Class are established as the class leaders to beat when it comes to executive mid-size saloons. But with seemingly so little between them, which one stands out from the crowd? And should these German powerhouses be worried by the all-new Lexus ES? Stick with Mat for his latest group test, and let us know which one you’d choose
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