Once you tap on Log In, enter your email address and then tap on Continue, and then enter your password or your TAN Code to log in, and then again tap on Continue.
Once you are logged in, tap on the three stacked horizontal lines on the top left corner of the screen.
On the side bar, you will see a tab which says My Vehicles.
Tap on My Vehicles.
You will see on the screen all your listed vehicles. Tap on the particular car you would like to be removed.
Once you have selected the vehicle you want to remove, scroll down at the bottom of the screen, you will see an option which says Delete this vehicle.
Tap on the option which says Delete this vehicle. Once you tap on this option, you will see a small disclosure stating all the information related to this particular car will be removed from your account and that Mercedes Benz would retain this information for their records.
If you still would like to delete this particular vehicle from your account, tap on Delete Vehicle.