The Arbeiter-Samariter-Bund (ASB, Workers’ Samaritan Union) in Mannheim, Baden-Württemberg, operates professional as well as volunteer services, using a variety of vehicles.
Krankentransportwagen (KTW) – Ambulance
Rettungswagen (RTW) – Emergency Ambulance
Notarzteinsatzfahrzeug (NEF) – Emergency Doctor Car
Behindertentransportwagen (BTW) – Wheelchair Ambulance
Personenwagen (PKW) – Utility Cars
Please note that these are scans from old 35mm slides in my archives, with resultant deterioration in colours and sharpness.