Car on right in background is indeed a BMW 1800 Tii. D Safari was probably used as chase car/parts fetcher/crew transportation, we use an Estate car for that very purpose, easier to get around than a van- good to see things are as they have always been!
The D does make a great camera car, the local Citroen specialist has a D and a CX safari with rear body lopped off for camera work. They look cool and hire out for a fortune.