198 Driving and operatingDeactivationThe camera is deactivated when acertain forward speed is exceeded orif reverse gear is not engaged forapprox. 10 seconds.Activation or deactivation of the rearview camera can be changed in themenu Settings in the Info-Display.Vehicle personalisation 3 127.FaultFault messages are displayed with a9 on the top line of the Info-Display.The rear view camera may notoperate properly when:■ the surrounding area is dark,■ the sun or the beam of headlights isshining directly into the cameralens,■ ice, snow, mud, or anything elsecovers the camera lens. Clean thelens, rinse it with water, and wipe itwith a soft cloth,■ the tailgate is not closed correctly,■ the vehicle had a rear-endaccident,■ there are extreme temperaturechanges.Traffic sign assistantFunctionalityThe traffic sign assistant systemdetects designated traffic signs via afront camera and displays them in theDriver Information Centre.Traffic signs, which will be detected,are:Limit and no passing signs■ speed limit■ no passing■ end of speed limit■ end of no passingRoad signsbeginning and end of:■ motorways■ A-roads■ play streetsAdd on signs■ additional hints to traffic signs■ restriction of trailer towing■ wet warning■ ice warning■ direction arrowsSpeed limit signs are displayed in theDriver Information Centre until thenext speed limit sign or end of speedlimit is detected or up to a defined signtimeout.