The Ehrhardt E-V/4 also called "Straßenpanzerwagen" is an iconic German Armoured Car built in 1917 It was a further development of a previously built Ehrhardt 1915 These vehicles had a completely revised frontal armour with reduced weight by 1.75 ton. Underneath protection was enhanced with another armoured plate protecting the engine, headlamps were enclosed in armoured boxes, front vision ports offered better protection, the rear double wheels were protected by an armoured mudguard, and moreover, the central turret was now fully revolving.