The recommended spark plug gap for a 1997 Volkswagen Cabrio depends on the engine it has. Volkswagen used several different engines in the Cabrio that year. You
must consult your owner's manual or a reliable repair manual specific to your Cabrio's engine code (found on a sticker usually located in the engine bay or the driver's side door jamb) to find the correct gap.
There's no single answer without knowing the specific engine. Trying to use the wrong gap can lead to misfires, poor performance, and damage to your engine.