The Opel Caravan was ready when technical assistance was required at the trackside – back then the signalling department was a byword for the reliability and technical expertise of the former German Federal Railways. Then as now, perfect functioning of the signals was a top priority for the railway. In the post-war decades, it was the signalling department who headed to the work site in their grey service vehicles with the name of the depot right underneath the golden DB logo. Nowadays the former signalling experts still work in signalling and safety technology. The Opel Rekord 1960s Caravan performed its service faithfully over many years on behalf of the German Federal Railways. The grey paintwork made it unmistakably clear that the vehicle was part of the railway's road-based rolling stock.

Body tent grey, windows with a topaz tint. Radiator grille bars with Opel logo at front, side door handles and ornamental strips, and with “Olympia” lettering, all in silver. Indicators imprinted orange. Bonnet with silver Opel lettering at front, silver “1700” type lettering at rear, and boot handle. Wheels painted silver. Front headlamps hand-painted silver, four tail lights painted carmine red. On the doors, golden-yellow DB logo and “Signalmeisterei” lettering in the same colour.