EURO 3 emissions compliant diesel developing , this coupled to a ZF 6HP 602 fully automatic six-speed transmission with integrated retarder. For test purposes the power pack of the Fuchs can be run outside the vehicle. The rigid Mercedes-Benz drive axles are of the hub-reduction type, fitted with differential locks and are sprung by progressively acting coil springs and shock-absorbers. Power-steering is on the front four wheels, the Fuchs 2 offering the option of a central tyre inflation system (CTIS). The 1400 R20 tyres are of the run-flat type. On land maximum speed is and operational range is 800 km. The Fuchs was designed as an amphibious vehicle, water propulsion provided by two four-bladed propellers mounted one either side of the hull at the rear. Maximum water speed is approx. 8 km/hr. For steering, the propellers can be swivelled through 360°. Before entering the water, a trim vane, which is stowed on the glacis plate when travelling, is hydraulically erected. Bilge pumps are fitted. As part of the TPz A8 upgrade, the amphibious capability is removed, but the vehicles can wade up to 1.3 m. The welded steel hull of the Fuchs was designed to protect the crew from armor-piercing small arms fire and shell splinters. For service with the United Nations Implementation Force (IFOR) operating in Bosnia, a higher level of protection was required and a batch of Fuchs 1 were upgraded with passive fibre compound add-on armour package developed by IBD-Deisenroth. This armour package includes an add-on armour mounted externally on the sides of the hull; internal spall liners fitted to the hull sides, rear and roof to reduce the secondary effects of particles having penetrated the main armour; additional elements in the floor area of the front and rear compartments to provide increased protection against mines; new windows with increased protection and modification of the window protective shields. The TPz A7 upgrade included protection enhancements, as does the current TPz A8 upgrade. For the TPz A7 and A8 upgrades, additional elements protect the underside and lower part of the hull against blast and IED threats. The baseline Fuchs 2 provides protection against small arms armour-piercing attack through a full 360°. To meet different threat levels the Fuchs 2 has been designed to be fitted with enhanced passive armour packages developed by IBD. To enhance survivability while conducting Military Operations in Urban Terrain (MOUT), Rheinmetall has developed a