The RNS 510 system on my 2013 Passat has started to reboot every 5-10 minutes. Friday, it quit and rebooted seven times in a period of about 35 minutes. It functions, freezes up and after a few minutes the system reboots. Has anybody else had this problem and how was it fixed? Going into the shop Tuesday. Lastly, does the GPS have a route speed limit icon posted on the map? Mine does not and guess I am just spoiled by my Garmin & Rand McNally GPS systems.