The Mercedes-Benz E-Class W213 (2016–2023) resets its ASSYST PLUS service reminder through a hidden instrument-cluster menu, opened with the two steering-wheel buttons — the same engineering menu that reads the dipstick-free oil level and puts the electronic parking brake into pad-replacement mode. These owner guides cover that menu’s jobs plus the AdBlue, battery, key-fob, TPMS, jump-start and fuse procedures specific to the W213 saloon and estate.