Great advice - thanks. The grommet I am struggling with is 111 997 22 81, which guides 2 gas lines through a hole near the gas filler cap. The gas lines are very thick, probably non-stock, and go from the filler neck to the gas expansion tank. I need to lube the gas lines to get them through the tight grommet, or buy the correct gas lines = more trouble and expense. The attached photo shows the hole which the grommet covers. I am suspecting the lack of the proper grommet to be the cause for gas smell in the car after a fill-up.