There is a resemblence, but the head lights and bumpers are totally different.
Apart from that keep in mind that the 5 series is based on the 7 series which has been out for a long time. Then the grille shape is just typical BMW. They've had the double grille since they've started making cars. The profile of the cars is different too. Not to mention the build quality.
Also, I don't think they even sell Pontiac in Europe
