Clk3122

HI everyone my sunroof will go all the way back and up and down with no problems . But when it comes to closing it ( moving from back to front) it will get stuck like a inch from total closing. It's a metal lip that goes up when open and down when it's in the closing position for some reason the metal lip is not going down all the way and its not alowing the sun roof to close. For it to close I have to hold the metal lip down with fingers to get it to close any one got a fix. Thank you