Originally Posted by bob dirt
Pretty sure it's an MB thing.I don't have steering wheel controls.I tried to download the Manual but my internet down here in Mexico is stupid slow. I'll be back home in a week and want to figure out the secret.
After I filled it up (DEF), I couldn't find the level indicator. After going to Valley of Fire and back, it worked again.
Yes it's a MB mystery. Mine will appear at times and then disappear and go to the clock adjustment mode. It's been one of those challenges to figure out the right combination.
Today I stumbled onto making it work 5 or 6 times in a row. Each time I left the vehicle sit for a while without the key in it for 15-30 minutes. Then put the key in and turned to position 2, momentarily cycled the M button and right after the oil can icon the DEF level appeared rather than the clock adjustment mode. I'm convinced it's probably available on everyone's MBS but finding it is a mystery.