Central locking; late version, may require 6x couplings #202 800 02 53; models w/ adjustable headrest add 2x #124 805 02 44; models w/o reversing aid add 1x #210 800 00 53

i am buying a new pump and this is whats recommended for couplings by seller? do i need more? your list above shows more couplings. the pdf doesnt help much, is there a sketch showing how to hook up all these couplings..

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1993 500SEL