One problem related to check engine light on has been reported for the 1999 Volkswagen Beetle. The most recently reported issues are listed below.
I bought my 99 Beetle in October of 2007 and the day that I got the car the oil light came on and I took it back they had it for one month they replaced the motor and wire cluster. When I finally got it back about two weeks passed and I was driving on the interstate and my speedometer went from 0 to 120 and then the care lost power on the middle lane of the road. I took it back and they replaced the transmission I have tried numerous times to get them to take the car back and they wont. After I got it back that time the heater stopped working and the speedometer will not go above 40 when I told them this they said they would not fix it that it was my problem. Yesterday my mileage, speedometer, and gas gage stopped working my check engine light came on. And I don't know what to do if you know any one who could help me with these problems please let me know.