Airbag light and Oil Change
 

I am brand new to the Mini world. I just bought a 2006 base model convertible and love it. First day I have it the airbag light comes on. Took it to a local shop and they told me it coded 128 front mrsa. They could not tell me what the code was for and could not reset it. Does anyone know what this code is ? I also went to change the oil and the oil drain plug will not come out I used a 13 mm socket and a breaker bar and just managed to strip the bolt. Can anyone give me any information on either of these problems?