The Johanniter-Unfall-Hilfe (JUH, German St. John Ambulance) in Heilbronn, Baden-Württemberg, operates professional as well as volunteer services, using a variety of vehicles.
Krankenwagen (KTW) – Ambulance
Mid-1970s Volkswagen ambulance as it would have been delivered ex-works, the JUH emblem on the sides is much smaller than the size usually seen.
Lastkraftwagen (LKW) – Truck
Please note that these are scans from old 35mm slides from my archives, with resultant deterioration in colours and sharpness.