This weekend, when I started my car(2008 beetle), it was sputtering. My husband looked into it and it was my coil packs. He changed them yesterday and did an oil change. After we let the car run for a good half hour, no problems. Today I started the car and the speedometer is jumping, there is a constant dinging (much more high pitched than the seat belt chime) and while I had him out to show him, I noticed the trip odometer went up from 338.1 to 338.2. This happened while I was parked in the driveway... not moving. We are thinking it is the speed sensor but I want any and all input.