Mercedes-Benz S-class vehicles have been exclusively used by the German Head of State. The most famous variants were the Mercedes 300 series "Adenauer" & the stretched "Pullmann" variants. And as a matter of fact, even today the President of Germany still uses a Mercedes-Benz S600.
New Zealand has bought a massive fleet of BMW 7 Series limousines as its new fleet of ministerial cars & this is for the first time in the recent decades that the government hasn't opted for the Australian Ford vehicles.
The Queen of England travels in one of two bespoke Bentley State Limousines. 'The vehicles are based on the Bentley Arnage floorpan, with a twin-turbocharged 6.75 litre V8 engine that has been modified to produce 400 bhp (298 kW) and 616 lbf ft (835 N m) of torque. Maximum speed is 130 mph (210 km/h). The state limousine is three feet longer than a standard Bentley Arnage, 10 inches taller and six inches wider.'
The President of the United States uses an armored Cadillac limousine, the vehicle has extensive features including dark windows, state-of-the-art communication, protection systems, & a hidden desktop for use of the President.
Lexus LS 600h is used by the President of Iceland.
President Ólafur Ragnar Grímsson posing next to his LS 600h
Chief Executive of Hong Kong, Donald Tsang uses Lexus 600h for his travel.
His Serene Highness, The Sovereign Prince of Monaco, Albert II also uses a Lexus 600h for his travel.
French opted for Renault Safrane Biturbo.
Republic of Nicaragua:
Here the official car is the Mercedes-Benz Geländewagen.
The Republic of Malawi:
The President Mutharika uses a Land Cruiser.
Sri Lankan President Mahinda Rajapaksa, uses a E38 BMW.
The President of Czech Republic rides in a domestic car: Skoda, one of the oldest car companies in the Czech Republic & the world.
Opts for a Mercedes-Benz W140.
King Gyanendra uses a Jaguar.
For official state visits & celebrations ZIL 41052 is used & on regular commute to & from work, Putin uses a Mercedes S-class.
Japanese prime minister uses a Toyota Century.
President Gontebanye Mogae uses a Bentley Arnage.
The Sultan has the largest collection of cars in the world, running nearly about 5,000. His collection includes: Ferrari, Bentley station wagons, 500 Rolls-Royces, a Porsche Carrera GT, a 959, six Ferrari FXs, the only right hand drive Benz CLK-GTR, & seven McLaren F1s.
The Chancellor & the other government ministers ride in Audi A8s.
The President of Finland uses a Mercedes-Benz S 600 L.
Source: 1, 2, 3, 4, 5, 6, 7, 8, 9.
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