If Fabia 1.4 16v engine code AUB then suspect piston ring fault. Check if car is using excessive oil. Combustion gasses will be blowing by the piston rings and into the crankcase. Oil vapour is then blown up into the air intake and into the throttle body, throttle body will be dirty. Can occur on very low mileage cars.
Take 4 q-tips and place them in the round slots on the left and right part of the radio. Press them in a little bit and pull it out. That's it.
A broken driveshaft can be caused by several thing the spline can be stripped or worn out where shaft goes into transmission. You can break a driveshaft by being overloaded and starting to abruptly. This especially happens in overloaded trucks on a hill the pinion shaft can break through overload or to much torque such as drag racing the welds on ends of shaft can crack.