550 airbag diagnostic plug - EU car.

Morning all,

have an airbag light illuminated on a 550. UK spec car. I've seen a thread about shorting pin 1 of the connector to ground, to either give blinks for a fault, or to clear the light. The picture shows a 4 pin connector, but the only one I can see is at the end of the passenger airbag harness - a 2 pin connector that I'd expect to see. Is there another one I should be looking for? Cheers, Chris.