We have just bought a cla 13 plate and noticed that when the ignition is turned on there is a warning light that appears on the centre console saying passengers airbag is off for about 10 seconds then goes off . It doesnt matter if there is an adult on the seat or not it always says they are off. We have been back to the garage and had a new sensor fitted but the same problem is still there .does anyone know how we can turn on the airbags in the front or is it a case of the light has gone off so they are actually on and the light only stays on when they are deactivated