[PDF] KDC-MP242 KDC-MP142/CR - KENWOOD for each device appears (KDC-MP242 only). Volume control : [AUD] knob Turn the knob to adjust the volume. Faceplate release : Release Releases the faceplate lock so that it can be removed. Refer to the following diagram when reattaching the faceplate. ¤ • The faceplate is a precision piece of equipment and can be damaged by shocks or jolts.