A $40 million order for 800 Opel Insignia wagons may have to be cancelled after officers found it difficult to get out of their seats.A state police force in Germany has been left red-faced after placing a €25 million (NZ$40m) order for 800 Opel Insignia wagons which turned out to be unsuitable for its officers.According to Germany's English-language news site The Local, 200 cars had already been delivered to the police force of the central-western German state of Hesse when an internal poll by police union GdP (Gewerkschaft der Polizei: Trade Union of the Police) found the car's seats were too narrow when officers were wearing the heavily-equipped belts, and the visibility was also deemed not good enough during car chases.The deal between the General Motors brand and the Hesse law enforcement bureau was struck at the end of 2010, and the Hesse Interior Ministry is reportedly still deciding whether the rest of the deal will be completed.Deputy chairman of GdP, Lothar Holzgen, claims the ministry should have tested the cars more thoroughly before making the order. He says the rearward visibility, which is quite hampered due to the car's sloping roofline, was a major issue."I need to see out of the back every minute, every second," Holzgen told The Local. "That's a safety matter for us."A ministry spokeswoman claimed the seats were tested prior to the cars being signed for."The results did not point to any lack of suitability for police service," the spokeswoman is quoted as saying.