>>2016999You anticipated correctly, though they did have heated seats due to the lack of warm summers in the past it took many decades until they were eventually retrofitted, refitted, and rebuilt to feature air condition systems. And even then, they are often limited to select wagons on the modernized variants, nicknamed the "turbocrapper" (derived from the original nickname for the unmodified Pafawag 5B/6B aka EN57/EN71 units, which were known as "crappers").
This nickname stems from initial production models having an issue with air from the brake ducts getting into the toilet, thus spreading the odor across the entire unit (I believe this was rectified by moving the toilet away from the motor car). Though apparently I've been also told that it got the name of "kibel" (toilet/crapper) from the toilet in the center wagon being converted to the technical/breaker room, with operators jokingly saying they were going to the loo (which apparently later became known as "the closet".
>>2017057Length refers to how long the train was produced for, not how long the train set is. Though a longer variant was produced, the 4-car EN71 (the first production model of which was also restored to factory conditions, though unlike the EN57-038 in OP nicknamed "grandmother" the so-called "grandfather" has a completely original interior complete with the bench seats.
The original glossy yellow-blue color scheme the EN57 came in was apparently inspired by Swedish trains and past pre-war EMU of a similar design already in use. These of course faded with wear and tear, exposure to vandalism and the elements. They were also nicknamed the "yolks" for this reason.
>>2017001>the old women there couldn't speak EnglishAh, those were the days. Quite frankly I'd be surprised if they could even speak Polish these days.