Footage taken from the vehicle’s video cameras show the man punching out at a wing mirror and kicking the side of the van as he argues with a woman.
Ambulance bosses are now appealing for anyone who recognises the vandal to get in contact with police after their van had to be taken off the road for several hours.
The vehicle was attacked at about 1.20am on Monday in the Woodside area of Telford, Shropshire.
He was filmed smashing the wing mirror and smearing mud up the side.
West Midlands Ambulance Service said crews had been treating a medical case at the time and have described the unprovoked attack as ‘senseless’.