Had for approx 6/7 years. Started not connecting a year ago then followed online guidance to reset it but it didnt save ANY files so after reset left with a useless tablet !! Probly an easy fix for someone but i have had enough of the damn thing !! Before the reset it would say “check batteries” and “check circuit 30/31 fuses and did this on my last w211 and current w211 so clearly a tool issue but now no apps/ nothing !!