So far in 2013, Mercedes-Benz has been America's luxury-car leader – but defending sales champ BMW (BAMXF 0.05%) isn't taking that lying down. BMW has started offering some great deals, hoping to steal those sales back – and it might just be working.

How will this battle play out, and what does it mean for shareholders – and car shoppers? In this video, Fool.com contributor John Rosevear looks at the latest numbers – and some of the latest deals – from both contenders, and offers his take on the battle for luxury car supremacy.