I am using my RRSC to tow my toy hauler and have read the manual about tow mode with sway control. Is there suppose to be an illumination on the dash when the vehicle is in tow mode? I can't seem to find that. When I had my 2006 RR, it would light up on the control panel a small picture of a trailer to let you know it was in tow mode. Thanks in advance for any advice..