The Ambulance features 6 slots, 2 less then other vans and come with working sirens. The sirens have a larger sound wave than the normal horn therefore attracting more zombies.
Note: The sirens are removed when upgraded into a Vandito.
The Ambulance is clearly marked by it's signature red cross, medical insignia, and sirens. The trunk will often contain medical supplies ranging from bandages to medical textbooks and rucksacks of EMT supplies.