You can disconnect the battery for a few minutes and that will clear the light. If there is a problem with the engine the check engine light will come back on. If it comes back on you will have to have the computer code read and fix the problem.
To find a fuse diagram for a 2000 VW Beetle first prop the hood on the engine. Locate the fuse box when will be on the driver side of the engine bay, and open the fuse box. The diagram will be shown under the cover.
The 2000 VW Beetle headliner is held in place by a retaining strap. The retaining strap encircles the entire roof. The retaining strap has approximately 20 screws holding it in place. Remove the retaining screws and the headliner will come free.
2000 Volkswagen Beetle L4-1781cc 1.8L Fig. 2 Engine Coolant Temperature (ECT) sensor The engine coolant temperature sensor is installed in the coolant return (arrow), located between the cylinder head and the radiator
remove hazard panel and radio and you will find 4 screws. Then remove the top panel, the one that reaches your windshield by sliding it back toward the windshield with some force. that will reveal 2 more screws.