Hi, I tried to read my own car tuning (2015 W222 S550 4.7 V8) just to take a look at what parameters are available and to get familiar with it, so I connected my MPVI2+ and started reading and selected the hardware to: MED 177 and MED 17.7.1 and (i couldn't read what is there actually), anyway, my car as I read from the internet should be MED 17.7.1 "not sure"
However, after selecting the hardware and pressing "Read" a pop-up message comes up asking me to update the ECM in order to enable tuning. I freaked out as I didn't want to do any adjustment all I want is to read for now.
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so I stopped there and started to search online but couldn't find any answers except for some whose the update failed and ruined the ECM and the car wouldn't start and the solution was to look for crashed files...
anyway, is it safe to perform the update and has anybody performed it ??
is there any precaution to be made before doing it?