Mezmar

My wife and I work for an airline and trade off driving our E 320 Bluetec to and from the airport, which is about 100 miles from home. When I drove up, a low tire inflation warning came up and I adjusted the pressure in all 4 tires with a compact compressor I keep in the trunk. My wife just drove it home and right away the tire inflation warning light came on, despite the tires not having lost pressure. About an hour into her drive an "ESP disabled--see owners manual" warning appeared, and then shortly after that, "Cruise Control disabled" appeared, and she indeed lost the cruise. Any ideas as to what is going on? Thanks