E-1 package providing 12,000 watt-hr lithium battery pack liberating you from propane and a generator. Solar panels maintain charge; quickly charges while driving and runs everything in the coach. Heater & continuous hot water can be run by battery power, shore power or off diesel fuel from the main fuel tank depending on whether plugged in or not. Ultimate freedom to stay anywhere without reservations while on the road yet with full power. Transferrable extended warranty, tire road hazard insurance and roadside assistance. Exterior coating for extended life. Tanks: 23 fresh/24 grey/11 black (macerator). Dumping tanks is a breeze and very clean. Tons of Mercedes safety features while driving and an incredibly comfortable ride. This is an amazing coach offering spectacular flexibility in travel.