Ambulances used for internal patient transfers by the hospitals in Hamburg, before privatisation a veritable fleet of these vehicles was owned centrally.
Standard Volkswagen ambulance – with no blue lights and sirens:
Later model (though the short wheelbase version, not suitable for a legal ambulance due to space restrictions), same set-up:
Ford Transit conversion:
Volkswagen LT conversions (with rare lifting door at the rear), again without blue lights and sirens:
This might actually be a one-off vehicle, very similar in appearance to a normal emergency ambulance. I only ever spotted one of these in Hamburg:
Please note that these are scans from old 35mm slides from my archives, with resultant deterioration in colours and sharpness.