Hi i have a customer who has updated his navi system.it ran the update with no problems but now the screen keeps lifting and going down.he has taken it to someone with star system and they cannot communicate with it and told him he needs a new system.Is there a reset procedure for this or does anybody on here repair the units
vin number WDD 204008 2A 243658
2008 mercedes C220 with command
map update number A2048270400
Many thanks