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If a fault occurs while ACC or Follow mode is operational, ACC will switch off and cannot be used until the fault is cleared. The message DRIVER INTERVENE is displayed briefly in the Message centre and is then replaced by the message CRUISE NOT AVAILABLE.

If a fault with ACC, or any related system occurs at any other time, the message CRUISE NOT AVAILABLE will be displayed. It will not be possible to activate ACC in any mode.

Accumulations of dirt, snow, or ice on the radar sensor or cover may inhibit ACC operation. Fitting of a vehicle front protector or metallised badges may also affect ACC operation.

If this occurs in ACC/Follow mode, the audible alarm sounds and the message DRIVER INTERVENE is displayed briefly. The message RADAR SENSOR BLOCKED will then be displayed.


The same messages may also be displayed while driving on open roads with few objects for the radar to detect.

Clearing the obstruction allows the system to return to normal operation. If the obstruction is present when ACC is inactive (e.g., on initial starting or with ACC switched off), the message RADAR SENSOR BLOCKED will be displayed.

Tyres, other than those recommended for this vehicle, may have different circumferences. This can affect the correct operation of ACC.