1996 Mercedes Benz C280 problem after charging battery

Mercedes battery one year old needed charge. I left it in garage without driving for too long. After slow overnight charge everything lit up but would not turn over. Gas does not seem to be getting thru to engine. Empty warning light on but gauge shows half full. My brother sprayed ether in fuel line and car turned over but when stopped spraying car stopped. It still lights up everything on dash and in car but won't turnover. Hope you can understand what I' m saying because I'm really a novice. Bought this car new in 1996 and I love it. It has very low mileage. Thanks