and power sockets at the passenger seats. The driver's cab controls were also modernised, the appearance of the front of the cab was changed and the original sliding doors were replaced with plug doors. EN57AL, EN57AKW, EN57AKD, EN57AKŚ, EN57AP, EN57FPS From 2011–2018, rebuilds into EN57AL (+ ALc & ALd), EN57AKW, EN57AKD, EN57AKŚ, EN57AP and EN57FPS took place in the same range or very similar to the above-mentioned EN57AKŁ. They are given various designations, e.g. EN57AL (the letter L was initially supposed to symbolise Lubelskie, now this designation can also be found on rebuilt Dolnośląskie, Mazowieckie, Opolskie, Pomorskie and Podlasie units), EN57AKW (letter W symbolising Wielkopolska) or EN57AKŚ (Ś symbolising Śląskie). The original motors are replaced with newer asynchronous ones (in the designation they are symbolised by the letter A), the trains are equipped with air conditioning in both the driver cabs and passenger interiors, ecological toilets in a closed system, blinds in windows, LCD monitors, power sockets and (on many 2013–2018 modernisations) free on-board Wi-Fi. Seats are replaced with ergonomic ones, the seating arrangement is changed and trains are equipped with a new braking system, improving the smoothness of driving. The AL/ALc/ALd versions for Lubelskie are equipped with on-board ticket machines, while the AKŚ units have on-board vending machines selling snacks and drinks for travellers. EN57FPS (Feniks 57) refers to some of the last and most extensive "turbokibel" rebuilds of twenty EN57 units, done by H. Cegelski in 2015–2018 under contract by Polski Tabor Szynowy, Polregio and Koleje Śląskie. Their top speed was similarly increased to 120 km/h, and their added features are similar to EN57AL, except that they have distinctive grey-coloured base liveries on the front. Interior only (2010–present) Due to the higher cost of undertaking the abovementioned extensive rebuilds of EN57 units into "turbokibels", since 2010 less extensive modernisations have also been undertaken, this being mostly to their interiors with some slight exterior changes. To keep costs low oftentimes "turbokibel" features such as air conditioning, power sockets and sometimes CCTVs and on-board toilets are omitted from such modernisations. EN57-1703 "ENdolino" In 2016, Koleje Dolnośląskie contracted ZNTK "Mińsk Mazowiecki" to refurbish EN57-1703, in which the area of the cab windshields were optically increased by applying black paint, which gave the front of the vehicle a modern look. For this reason, the unit was nicknamed "ENdolino". Preserved units EN57-001 (the first production EN57 trainset), has since 2017 been preserved in