Normal Mode
Normal mode is the starting point for the vehicle's normal operating state. It is obtained by way of the "Engine running" signal.
Levelling is possible. The compressor starts up as required.
| Coding parameter | Value |
|---|---|
| niv_normal_up_e | - 09 mm |
| niv_normal_up_d | - 07 mm |
| niv_normal_down_e | + 09 mm |
| niv_normal_down_d | + 07 mm |
A narrower tolerance band than that in Pre-mode can be used because the battery capacity does not have to be protected. The fast filter is used with a narrow tolerance band of ± 10 mm. In this way, ride level compensation takes place outside a narrow tolerance band of ± 10 mm. The faster filter allows the system to respond immediately to changes in ride level. Evaluation and control are performed separately for each wheel.
When a speed signal is detected, the EHC control unit switches into Drive mode. When the vehicle is stopped, the EHC control unit remains in Drive mode. The system switches back into Normal mode only when a door or the luggage compartment lid is also opened. If none of the doors or the luggage compartment lid is opened, the vehicle logically cannot be loaded or unloaded.
This prevents a control operation happening when the vehicle is, for example, stopped at traffic lights and the ride height is above the mean value due to a possible pitching motion at the rear axle.