car (DMOCLW) had a further 18 standard class seats, and 15 [2+1] arrangement first class seats, plus a wheelchair space, and a reduced mobility access toilet. Toilets were supplied by Driessen, seats by Grammer and Fainsa, and air conditioning by Air International Transit. Eco-Mode The trains were designed for the steep hills encountered on the TransPennine routes; as a result the units had a high installed power, unnecessary for most of the train's route sections, leading to low fuel efficiency relative to other DMUs. In mid-2007, Siemens and First TransPennine Express began a programme, named 'Eco-Mode', to improve the efficiency of the fleet. The project involved generating driver information giving route advice allowing more efficient driving, including information on when it was feasible to shut down a diesel engine, leaving the train 'cruising' on two of the three engines. Additionally fuel consumption was reduced by performing shunting using only one engine, and automating complete engine shutdown at depots. Initial changes in working practice resulted in a 7% fuel saving. Furthermore, as the engines are idling less and thus operating less (engine hours reduced by two hours a day per train), their service life may be extended by 15%. Operations TransPennine Express The 51 three-car Class 185 units, together with nine two-car Class 170 units, replaced the Class 158 (North and South TransPennine Express routes), Class 175 (routes between Manchester Airport and Blackpool / Cumbria) and Class 220 / Class 221 Voyager trains (operated by Virgin CrossCountry on routes between Manchester and Edinburgh / Glasgow). To free up stock for services between Manchester Airport and destinations in Scotland when First TransPennine Express first took over these routes, the frequency of the Manchester Airport to Windermere route was reduced from December 2007. In 2014, the introduction of ten electric Class 350 units on services between Manchester and Scotland allowed the displacement of Class 170 and some Class 185 units to provide additional capacity on FTPE's network. Two (originally four) Class 185 units were loaned to Arriva Rail North from April 2016 until May 2019. Following the introduction of the new Nova fleet in 2019 and 2020, it was originally planned and expected that 22 Class 185 units would return to Eversholt Rail Group. However, in September 2019, TransPennine Express announced that it would only be returning 15, with the remaining units being required to operate diversionary services during upgrades to the TransPennine