Hey all just spent this afternoon fitting a k and n induction kit to my leon tdi 150. The last part of the instructions said remove the cover in front of slam panel which completely foxed me so skipped that part, will it make any difference? Also am disappointed by the 'whooosh' it's suppose to make the car seems to go and sound as before. Finally the sterio has stopped working because I had to disconnect the battery before starting and can't find any codes in manual, all help appreciated thank you