BMW petrol guage - yorkie123
I have a 5 series BMW, bought recently, and two days ago the petrol guage was showing half way between empty and a quarter full. The low fuel warning light wasn't glowing, which comes on normally when you have around a gallon and a half left in. The car stuttered to a halt, and as luck would have it I was able to coast to a petrol station 400 yards away to fill up. It started then straight away. Any ideas what the problem is, and how difficult to fix?