BARCELONA, May 6 (Reuters) - Tariffs represent a burden of 5 billion euros ($5.88 billion) per year on German auto giant Volkswagen's VOWG.DE operating profit, the group's CEO, Oliver Blume, told an event in Barcelona on Wednesday.

Blume did not specify whether he was referring to current levies or the tariff hike to 25% from 15% on imports of cars and trucks from the European Union threatened by U.S. President Donald Trump last week.

($1 = 0.8511 euros)