Cnilu

Wife back up the car and hit the garage door, break the antenna, got a replacement at the dealer, but the antenna was a little smaller than the original one. (got a 08 C350 w/o NAVI). Had a shop installed it for us, but there is a gap between the antenna and roof. its not sealed completely. Shop told us to go to a bodyshop to flat the roof a little so it will get rid of the gap. Other wise the water will leak into the car when its raining. I attached some pictures, Let me know what you guys think. And what you guys suggest I should do to slove this problem? Will the water leak when its raining?
As you guys can see in the picture, I was able stick a thick piece of paper under the antenna. so the gap is pretty big.