The windshield glass installer people will gladly come to your house to install your windshield for you. It usually takes about an hour to change a windshield. The big thing to be careful of is, do you have the exact duplicate piece of glass to fit in your E-320? At a cost of $150, you should jump at this deal, I would guess the installation might be $150. Ask for an estimate before you make a deal. Make sure the replacement glass has no scratches, cracks, or edge nicks.