Monteverdi also made a station wagon based on a Plymouth. It remained a one-off that was never sold. When the production of the Volaré ended in 1980, Monteverdi chose another car to be converted. This time, it was the new Mercedes S-Class (W 126). The front got a massive chrome grille with four round headlamps, looking like an Alfa Romeo Alfetta (third series), while the rear lamps were provided by the Peugeot 505 sedan. It was announced in March 1982 for a price of 185,000 Swiss francs and badged as Monteverdi Tiara. It is unknown if serious production took place, particularly as the final design looked somewhat dated, being less aerodynamic looking, when compared to the Mercedes-Benz original. In 1978 work began on a four-door version of the Range Rover. This was executed with the active cooperation of Land Rover, which also allowed customers to order Monteverdi Range Rovers directly from Land Rover dealers. The Range Rover Monteverdi was introduced in March 1980 at the Geneva Motor Show. While the design work was carried out by Monteverdi, the actual work took place at Fissore's factory in Savigliano. White two-door cars were sent directly by Land Rover with an extra set of doors for conversion. Following the introduction of Range Rover's own four-door model in 1981, Monteverdi ended their conversions in early 1982. Around 167 cars were built, although a range of other numbers has also been suggested. Car production in Basel ended by 1984. The factory was converted into a museum, the Monteverdi Car Collection, which opened in 1985. In 1992, Monteverdi tried to re-enter the car scene with the Monteverdi Hai 650 F1 with no success. Two prototypes have been built, all residing in the Monteverdi Museum in Basel. Formula One In 1961, Monteverdi modified one of his MBM Formula Junior cars to be eligible for Formula 1. The chassis was strengthened and lengthened to use a Porsche RSK sports car engine. Porsche refused to sell Monteverdi an engine, so he bought a complete RSK, removed the engine and tuned it to give about 150bhp. The MBM had a conventional space-frame and suspension. After having success in Swiss hill climbs, Monteverdi entered the MBM in the 1961 Solitude Grand Prix. He qualified last on the grid, and retired after two laps with engine problems. The car was written off in a Formula Libre race in Germany, and the remains