Careful when hitting signs on chains, you know the ones that are strewn across a drivway.... The stunning aerodynamic design of the A4 causes these nasty objects to bounce up and on top of the car, dragging the chain links along the beautiful, thick, german paint job, sort of like a reverse jump rope, with a rusty chain. The chain will not snap....oh no, this would be too easy, instead, it needs to destroy rthe grille, hood, windshield(s), roof, and rear deck.<p>Don't hit these things....try really hard to stop.