Air Bag On-off Switch problems of the 2003 Mercedes Benz E320

Vehicle presented with red light indicating to take vehicle to workshop in red. Braking was extremely difficult, srs system stalled the vehicle, emergency mode was activited,we were unable, at first to turn on the ignition switch. The vehicle operated as if it was paralyzed. We finally got the vehicle to run and turned vehicle into mb dealership. We were informed that the sbc unit was in need of replacement, we were beset with 1,800. 00 repair. The vehicle is very dangerous to drive if you are not prepared for longer stopping distances, thankfully my husband was able to get the vehicle to the dealership. I found myself not strong enough to press on the brake pedal for adequate braking distance. Fuel: upon fueling vehicle, the fuel handle will stop and immense amounts of fuel will spurt out from fuel tank. There is also a smell of gas/fuel in the cabin after fill up. This creates a huge spill and notification to attendant. Takes up a great amount of time to fill up tank. Surprisingly we haven't been charged for fuel spills. Srs: light on for safety response system, shortly after visit at mb dealership. Have not taken vehicle to mb dealership for fear of another expensive repair.