I don't expect everybody to share my enthusiasm for the bullnose Mercedes, but bear with me while I explain why this one is special. It's blue. (They are nearly always orange or grey/green). It's articulated, while most of them are rigid 10-wheelers. It has a white painted exhaust stack, nothing short of an affectation. It even has some tread left on the tyres. And it was there, waiting for me.