I agree. It's the sticker which makes your car give out all the wrong signals .
I think it's pretty unanimous here that you shouldn't use this car for your interview if you really want the job . If i really wanted a job I'd do absolutely everything to give the right impression right down to the finest detail and wouldn't give it more than a seconds thought on whether I take a car like yours .
Good luck by the way with the interview and I'm sure we'd all love to hear that you got the job!