E-Steer which eliminates the need for the traditional power-steering system's hydraulic pump, hoses, fluid and belts.

ECONOMIST: MONITOR

The M5's adaptive steering system hydraulic and not electric-assist, as in the regular 5 reacts as fine as a bee's wing, firm and exact.

WSJ: 2013 BMW M5 Review: Too Smoothly Outrageous for America | Rumble Seat by Dan Neil

Before landing, the flight crew were not aware the nose wheel steering system was not working, as the hydraulic fluid level was low.

BBC: NEWS | Europe | Isle of Man | Air crew criticised for fire risk