Hi, How do I go about checking the battery disconnect plug. I have checked that it is securely fastened but how would I check the actual function of the BDU

Have checked them and they are both tight.

Hi, I have recently brought a 2003 L322 TD6. I have had numerous electrical problems with central locking and have been disconnecting and reconnecting the battery often. Suddenly the air bag light came on and does not go off except for about a second just after start up. It is now due for its...