RepairPal Certified shops can diagnose and repair your 1999 Volkswagen Cabrio. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
You'll need to acquire a copy of the owners manual, or the workshop repair manual. Try to do some online searches and perhaps you'll get lucky. Or you can subscribe to a service like AllData or Mitchell One. Try www.alldatadiy.com.