Typical behaviour when you have an airbag issue: upon starting the car orange 'airbag' light flashes before going on solid after about 5 mins.
I believe the pretensioner light (picture of seatbelts) also is supposed to behave in the same way, but when i had problems it would come on solid part way through a journey!!
In a lot of cases the problem lies with the 2 orange connectors under each of the 2 front seats. You can sometimes confirm this by wiggling the connectors with the engine off and bringing a short term fix to the problem. It becomes especially bad if you move the seats a lot for different drivers or back seat passengers. To fix this you need to replace the connectors.
Before doing any work on the airbag system disconnect the battery and tie the cable out of the way! Dont touch any of the airbag circuits for 10mins. Disconnecting the battery should also mean airbag faults will be cleared (always has for me when the prob has been fixed) when reconnected.
The process is the same for both front seats altho you must remember to raise the drivers to max.
Using a torx socket undo the 2 bolts holding the rear of the seat, then slide the seat forward and do the 2 at the front.
bud_205 has attached the following image: