FRANKFURT (Reuters) - Volkswagen Group said on Thursday its vehicle deliveries last year were slightly above the previous year's level, revising up an earlier forecast which predicted 2019 sales would be level with the year before. In 2018, the multi-brand car and trucks maker, which owns the Scania, MAN, Lamborghini, Skoda, Audi, Porsche and Bugatti brands, delivered 10.8 million vehicles to customers. Volkswagen chief executive Herbert Diess issued the revised forecast during an investor..