Recommended to be replaced at 12000 miles or once a year.
Tools and Parts;
This should be carried out every 12000 miles or at least once a year.
(It is recommended your points and condenser should be replaced as a set, I must admit I never have done and never had a problem in 15 years of driving air-cooled VW's but I always carry spares.)
Tools and Parts required;
Tools and Parts required
It is recommended to grease up your beam every 6000 miles or at least once a year. Additionally I was advised recently that you should raise the front taking the load off the components before completing the work.
Tools & Parts Required
If doing this as part of your service interval worth doing the valve adjustment check first.