Hi,
here you can see all pieces of the lighter which will help you:
https://www.sl113.org/forums/index.php?topic=1175.msg29424#msg29424 and
there is a description in the Technical Manual with details:
https://www.sl113.org/wiki/Electrical/CigarLighter Removing the lighter
The cigar lighter, with all of its pieces can be tricky. A close up of the lighter assembled (out of the car) is shown. Also, a picture of the lighter pieces (out of the car).
1 - Unplug the cable connection from back of lighter
2 - Unscrew small pin connection on rear of lighter (6 or 7mm?)
3 - Remove small lock washer, then small insulated washer. Note: the insulated side if the washer must face towards the lighter housing upon reassembly.
4 - Unscrew the next piece with the permanent round pin & flat guide pin
5 - Remove the thin washer
6 - Unscrew thin nut that holds the lighter bracket in place
7 - Slide off bracket from rear
8 - Slide remaining lighter housing out of the front of the dash
9 - Reassembly is in reverse order. Pay special attention to the direction of the insulated washer. Also ensure that the notch in the ceramic piece lines up with the raised notch in the lighter housing.
...WRe