The flexible design is based on a modular system with lengths of 10.5 m till 18.75 m. This high-performance vehicle family suitable for use by handicapped passengers has been optimised for different conditions and customer requirements in city and intercity transport and offers maximum space and safety. The layout of the cockpit, passengers' compartment and driveline permits a clever and optimised use of the vehicle height and length. The driver's cockpit and the passenger compartment with standing platform and pram and wheelchair area have been considerably optimised so that all new regulations and customer requirements can be fulfilled. The modular drive and air conditioning system is innovative and forward-looking. The low-maintenance elements can be quickly serviced. Ecological improvements have been achieved with the latest and most efficient Euro 3 and Euro 4 diesel drive technology or gas drives which complies with Euro 5.