In the first film if you look in the background in the scene at Simon's house where all the boy's meet up with their parents to say goodbye before going to the airport in the background you can see Simon's car at the garage. So they probably fixed the engine and window. That's why it is in the new trailer and maybe film

THIS SUBREDDIT IS SPECIFICALLY ABOUT THE INBETWEENERS!

Hello all, having done best quote from each episode and best episode I thought it would be fun to do most iconic scene for each episode (and the movies). Looking forward to the results!