Precautions for optic fiber box：

1.If your car has a factory Harman/Kardon speaker,please be sure to buy the corresponding optical fiber box.

2.Compatible with the following models.

Optical Fiber Box A MOST25-01：
For Mercedes-Benz R class 2005-2018
For Mercedes-Benz ML 2005-2011
For Mercedes-Benz GL 2005-2013
For Mercedes-Benz CLS 2009-2012
For Mercedes-Benz S W221 2005-2012
For Mercedes-Benz SLK 2009-2012
For Porsche Cayenne 2004-2015

Optical Fiber Box B MOST25-02：
For Mercedes-Benz CLS 2005-2008
For Mercedes-Benz E 2003-2008
For Mercedes-Benz S 2004-2006
For Mercedes-Benz SLK 2005-2008
For Mercedes-Benz CL 2004-2006

Optical Fiber Box  C MOST25-BZD2B-01：
For Mercedes-Benz S/CL Class (2000-2003)
For Mercedes-Benz E Class (2000-2002)
For Mercedes-Benz SL (2003-2004)
For Mercedes-Benz C/CLK (2001-2004)
For Mercedes-Benz ML (2000-2005)

3.Connection method：
Connect the B+ cable (in yellow) and GND cable (in black) to the corresponding cables (in same color) from the power cable.

4.After installing the fiber optic box,  radio does not support adjusting EQ.