Tires with a specified direction of rotation have additional benefits, e.g. if there is a risk of hydroplaning. You will only gain these benefits if the correct direction of rotation is observed.
An arrow on the sidewall of the tire indicates its correct direction of rotation.
You may mount the spare wheel against the direction of rotation. Adhere to the time restriction on use as well as the speed limitation specified on the spare wheel.
Exterior spare wheel bracket
General notes
WARNING
If the spare tire is more than 6 years old or is
not the same model as the regular tires, have
the spare tire replaced with a new tire at the
nearest Mercedes-Benz Center.
...
Driving systems
Cruise control
Important safety notes
WARNING
The cruise control is a convenience system
designed to assist the driver during vehicle
operation. The driver is and must always
remain responsible ...
Mirrors
Rear-view mirror
■ Anti-glare mode: flick anti-glare lever 1
forwards or back. ...