City El uses DOT5 siliconebrakefluid,and because of so you don´t need to change brakefluid,like in a normal car.
Siliconebrakefluid does not absorb water,like normal brakefluid.
There is DOT5,1 brakefluid on the market,THIS IS NOT SILICONEBRAKEFLUID.
use only DOT5.
regards
Alan
Dänemark