Wikipedia: "By mid-2005, each ICE 1 trainset built in 1991, had travelled 6.5 to 7.9 million kilometers and had been in revenue service for up to 14 years. In the summer of 2005 a refurbishment program was started, referred to by Deutsche Bahn as "Redesign". It is planned to toughen up all trainsets for another 10 to 15 years of service at the Nuremberg main railway workshop completing in December 2008. For the refurbishment, trainsets are taken out of service for five weeks (25 work days). Refurbishing a single ICE 1 trainsets costs about three million Euro, a fraction of the cost of buying new trains. The entire program cost about 180 million Euro."