Removing MPQ Contacts From Contact Carrier:
WARNING: This page is about a different car, the 2003 BMW 530i, 2002 BMW 530i, and 2001 BMW 530i. However, it is still accessible from the selected car via links, so may be relevant.
Remove contact carrier (1) with MQS contacts from radio plug.
Raise lock (2) on radio plug.
Pull contact carrier (3) out of radio plug.
Press lock (1) in direction of arrow.
Pull secondary lock (2) in direction of arrow completely out of contact carrier (3).
Press special tool 61 1 135 on inside of contact into contact carrier (2).
Pull wire with socket contact (1) out of contact carrier (2).