The Deutsche Bundespost (German Federal Postal Service, now split up and privatised) had its own Disaster Response Service, providing cover in emergency situations and mainly geared towards a civil defence role (local fire and other emergency services would usually be quicker to respond in normal emergencies).
Members were trained in roles like fire-fighting, first aid, and even rescue, and vehicles were allocated to larger sites.
The Mercedes trucks with a simple box body were equipped with first aid and light rescue tools, and had a fire-fighting trailer as well. This specimen was allocated to the Stuttgart offices:
And the same basic vehicle, but still with a front winch, at the Mannheim offices:
Please note that these are scans from old 35mm slides from my archives, with resultant deterioration in colours and sharpness.