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. If one of the following items of optional equipment: S2VFA, S5DPA, S606A, S609A, S6VAA is fitted, the trim panel does n o t have to be replaced. On F20 125d / 120xd and F21 125d / 120xd vehicles a trailer tow hitch may not be retrofitted if 19" optional accessory wheels are fitted. An exchange of the "Lüfterzarge mit Lüfter" and "Kühlmittelkühler / ausgelagerten Kühlmittelkühler" may be necessary. If on the picture panel in the main group 17 there is a "Lüfterzarge mit Lüfter" and "Kühlmittelkühler / ausgelagerten Kühlmittelkühler" designated to the OE trailer tow hitch, then this part number has to be ordered and installed as well. Only in conjunction with trim panel, rear right Only in conjunction with rear silencer