Hi I'm having some problems trying to fit an S-Line front bumper cover on the regular A4 avant. Should I modify anything? I cannot make the driver side (where the water bottle is) close properly. It seems to be too 'tight' to fit. any help would be appreciated - spent the whole Saturday on it ps i just found that the black plastic 'air intakes' or whatever they are called need to be replaced - i took them off but still cant seem to get the bumper cover on anything i'm missing? It seems to be something on the side where the pump for the headlight washers is.