The Deutsches Rotes Kreuz (DRK, German Red Cross) in Stuttgart, Baden-Württemberg, operates professional as well as volunteer services, using a variety of vehicles.
Krankentransportwagen (KTW) – Ambulance
Rettungswagen (RTW) – Emergency Ambulance
The larger Mercedes was used for training purposes, facilitating an additional trainee crew member.
Notarzteinsatzfahrzeug (NEF) – Emergency Doctor Car
Sanitätsgruppenkraftwagen (SanGrKW) – Civil Defence Multi-Purpose Vehicle with Possible Ambulance Use
Behindertentransportwagen (BTW) – Wheelchair Ambulance
Personenwagen (PKW) – Utility Cars
Motorräder (Krad) – Motorcycles
Mannschaftswagen (MTW) – Personnel Carrier
Lastkraftwagen (LKW) – Truck
Please note that these are scans from old 35mm slides in my archives, with resultant deterioration in colours and sharpness.