61 13... Circular connector, 7-pin, 8-pin, system D2.5
Carefully pull off rubber grommet (1).
Carefully press back retaining tabs (2) of internal connector (3).
Slide internal connector (3) in direction of arrow until retaining tabs (2) lock into locking groove (4).
With special tool 61 1 132 (pressing-off tool), press back retaining hooks (5) of appropriate contact and pull out cable with contact.