RBS invites bids to replace rolling stock on Line S7 of Bern S-Bahn August 20, 2015 | Europe News Regionalverkehr Bern-Solothurn (RBS), the public transport operator of Bern, Switzerland, has invited bids to supply 14 four-car electric multiple units (EMUs) to replace the existing Mandarinli train... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password