The ref# was referring to the bulletin # provided by Mercedes. Now the pump is located in the trunk where the back panel goes against the rear seat. After you remove that panel you can look on the drivers side and you will see a foam package that has a pump in it. Now as for the conversion I was thinking of the central door lock pump ( it gets modified) . Closure assist pump is a straight plug in . I can fax you the modification for the trunk closure assist that we are doing for less strain on the motor .It has the part numbers and instructions for this procedure.
