First Sign of Trouble

On the day of pick up, Mr. A went through a list of checks with the sales person. Unfortunately my rear right side power window would wind down, but will not wind up smoothly. This annoyed Mr. A slightly. Sales person suggest to accompany Mr. A to the service center nearby for a quick check. Service center did a quick fix by applying some oil to the lining. I hope this issue will not come back again. Otherwise i'm afraid Mr. A will not have a pleasant experience driving me.