2015 each track under hood generator/inverter issues after DEF repairs

[Cryptofit]

I have been having DEF issues in my 2015 etrek. And the Mercedes dealership. after trying many other things, decided to reset the computers on the sensors.

Something they did messed up my inverter electricity and The second alternator is no longer charging the batteries when the engine is running. The inverter is showing 888 everywhere that supposed to be a number.

What do I tell them to do to fix it? Can I just reset it?

By the way The computer reset did not work. and now all the sensors are messed up and I think the DEF countdown is on because the alarm is going off but the sensor does not show. x

I’m taking it back in the morning and they’re going to see what’s going on. I just need to tell them what to do.