Removing complete backrest:
Remove head restraint, refer to 52 13 390 REMOVING AND INSTALLING / REPLACING FRONT HEADREST (NORMAL/ MANUAL) .
Remove rear panel on front seat backrest, refer to 52 13 198 REMOVING AND INSTALLING / REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL/ MANUAL) .
Version with lumbar support (version as of Model Year 1996):
Unfasten cable connector (1). Detach hose (2) and disconnect plug connection (3).
Version with seat heating:
Disconnect plug connection (4).
Version with lumbar support/seat heating (version up to model year 1996, refer to 52 17 405 REPLACING BACK-REST COVER FOR FRONT SEAT (COMFORT) ON LEFT OR RIGHT SIDES .
Version with new head restraint drive:
Disconnect plug connection (1) for head restraint drive (2).
Remove cable from clips (3) downwards.
Version with bolted backrest frame:
Cut open cable tie (1).
Disconnect plug connection (2).
Unhook cable with bracket (3).
Detach air hose (4).
Version with bolted backrest frame:
Release screws (1) and detach backrest frame (2) toward top.
Pull off retaining clip (1) from left/right release lever.