Get right down to business. Graphics, etc., must be slick, professional. Order of presentation must be logical. Poorly planned presentation implies poor organization. Provide materials in English and German.
German language is very precise with many technical terms.
Observe hierarchy, titles, lines of authority to the letter. Titles must be precise. Young people suddenly grow up at about age 25. Talk about your efficiency, on-time performance, quality. The boss is expected to be a technical expert.