I always thought BMW invented the iDrive concpet, and benz copied it for the W221.
But it is not true, in fact the first to feature a rotary knob to control all functions in the car was a Mercedes-Benz (two concept-cars in 1995 and 1996, the Vario Research Car and the F200).
I think BMW came with that idea only with the 1999 Z9...
Here are extracts from Benz press release and a pic I found in a forum...
The 1995 Mercedes-Benz Vario Research Car:
"Mercedes-Benz engineers had also incorporated a new-style operating and control system into the dashboard of the Vario Research Car which harnessed the wonders of the latest microelectronics to make life easier for the motorist. All key operating information appeared in the form of symbols and text messages on two colour displays integrated into the cockpit and into the top section of the centre console. Easily understood coloured symbols were used to display important information about maintaining the applicable speed limit or a safe distance from the vehicle in front."
1995 Mercedes-Benz Vario Research Car's interior shown below. Notice the knob in the center console, in front of the armrest, and the high screen...
Mercedes F200, 1996
"The remaining display segments within the fields of vision of both driver and co-driver can be programmed at will. The required information can be called up by means of a rotary control: interior climate, navigation, TV, video, video games, PC, on-board computer, radio, CD player, telephone and a "help" function. The interior temperature on the driver's and front passenger's sides, out-side temperature and time of day are permanently displayed. The central display segment shows the area immediately behind the car, filmed by the rear video camera, when the F 200 Imagination is reversing.
The controls for heating, electric windows, swing-out-and-up doors, automatic transmission, lights, hazard warning lights, seat heating and stereo unit are arranged on a panel in front of the display where it is within easy reach of both driver and front passenger. This high-quality stainless steel panel provides a visual link with the stainless steel trim of the bodywork. The switches for the electric seat adjustment with memory function and for footrest adjustment are located in the door trim. A bracket for the mobile phone is mounted to the front stowage compartment in the dashboard. Placing the phone into its bracket activates the hands-off system as well as a new speech recognition system which makes manual handling of the car phone largely superfluous."
From what I know the first BMW to show that feature was the 1999 Z9 Concept and the "Intuitive Interaction Concept", so seems it is not Mercedes who copied...BMW only ddevelopped it faster (in a hurry?), with the result we know in the e65 7er...
I did not knew that, and I'm wondering why Benz did not advertize it?