The Malteser Hilfsdienst (MHD, Order of Malta Ambulance) in Frankfurt am Main, Hesse, operates professional as well as volunteer services, using a variety of vehicles.
Krankentransportwagen (KTW) – Ambulance
“Liegend-Taxi” – Non-Norm-Conforming Ambulance
Behindertentransportwagen (BTW) – Wheelchair Ambulance
Einsatzleitwagen (ELW) – Control Unit
Personenwagen (PKW) – Utility Cars
Lastkraftwagen (LKW) – Truck
Please note that these are scans from old 35mm slides in my archives, with resultant deterioration in colours and sharpness.