Vehicles with manually adjustable basic seat require also seat cable set Important: The installation instructions are not included in the retrofit kit. Print out the latest installation instructions from the Aftersales Assistance Portal (ASAP) and issue to the customer. only in conjunction with backrest/seat cover only in conjunction with switching centre,Vehicles with manually adjustable basic seat require also seat cable set Important: The installation instructions are not included in the retrofit kit. Print out the latest installation instructions from the Aftersales Assistance Portal (ASAP) and issue to the customer.