Appnut is pretty much on the money. Super wash is supposed to give you up to 24 mins of wash with the light staying on until the timer advances into the Regular Fabric heavy cycle. Your light not working could be anything from a bad switch and/or neon indicator to a bad contact in the timer (contact 9 on the timer chart). If you need it, I can get you to a service manual with timer charts and wiring diagrams.
Energy saver is simple on this one. Your machine has a special >3< coil water valve (the third coil is a additional cold water feed with a reduced flow). On energy saver hot, the hot and the 3rd coil cold feeds are on. On energy saver warm, the hot, cold and 3rd coil cold are on. You'll end up getting a colder warm and a cooler hot. Or so the service manual says...
RCD