Mercedes-Benz to bring steer-by-wire to new EQS

Mercedes-Benz is set to become the first German automaker to bring steer-by-wire technology to a production vehicle, when it launches on the updated EQS electric saloon.

The technology replaces the mechanical connection between the steering wheel and front wheels with electronic signals. It is said to eliminate unwanted road surface vibrations from the steering wheel while maintaining steering feel through model-based calculation of tyre-road contact forces.

A flattened, more compact steering wheel is used in place of the conventional design, improving the view of the driver display and making it easier to get in and out of the car, according to Mercedes-Benz.

The new steer-by-wire system has already completed over one million test kilometres on test benches, test tracks and and public roads.

A redundant signal architecture with two independent signal paths ensures steering capability is maintained in the event of a system fault.

In the unlikely event of complete failure, Mercedes-Benz says lateral control remains possible through rear-axle steering and wheel-specific braking interventions via the electronic stability programme.

The compact steering wheel required a newly developed airbag structure, as the inflating bag can no longer brace against a closed steering wheel rim.

An internal support and folding architecture controls the airbag’s shape during deployment, while meeting unchanged restraint and safety standards. Electromechanical steering remains available as an alternative.

It will be available on the EQS in combination with all powertrains and the model’s 10-degree rear-axle steering system.

Lexus has also introduced this technology on its new RZ500, which is available to Irish buyers now.