52 13 420 Replacing left or right support for front seat backrest (normal/manual)
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Operation is described in:
Replacing backrest cover for left or right front seat. Refer to 52 15 405 REPLACING BACKREST COVER FOR LEFT OR RIGHT FRONT SEAT (SPORT/MANUAL) or 52 13 405 REPLACING BACKREST COVER FOR LEFT OR RIGHT FRONT SEAT (NORMAL/MANUAL) .