Not about a lot of vehicle, for now, but after 10 trucks tested in Germany and Switzerland for a year, 8 other Mercedes-Benz eActros will also be test-driven in Netherland and Belgium:
Starting signal for second test phase with further customers: Mercedes-Benz eActros electrifies Rotterdam and The Hague with logistics service provider Simon Loos

So if a movie/series set in a German / Swiss / Dutch / Belgian location shows an Actros with a blue grille, that won't mean a customized truck, but a pre-series vehicle