Thermador documents E11 specifically as a touch-button problem that can be caused by condensation on the keypad — not a control-board failure. Wiping the control panel dry, powering the unit off at the fuse box, and switching it back on after about 10 seconds is Thermador’s own recommended first step, and it resolves the issue more often than people expect.
If the touch controls stay unresponsive after a dry wipe and full power cycle, that’s the point where it’s worth a diagnostic visit rather than repeating the reset.