| Self-diagnosis of parking aid (parking system) |
| The parking aid system measures the distance from the rear of the vehicle to an obstacle when reversing by means of four ultrasound sensors. |
| If a trailer is hitched up to the vehicle and the trailer socket is plugged in, the parking aid sensors are switched off. |
| After the ignition is switched on, an automatic test sequenceis carried out for about one second. |
| The parking aid control unit is now permanently in operation, but the distance measurement system is not activated until reverse gear is engaged. |
| As soon as the parking aid is ready, a short signal sounds (delay of one second in the case of vehicles fitted with automatic gearbox). |
| If the parking aid control unit detects a fault in the system, a continuous signal sounds for 3 seconds. |
Note | If a fault exists in the park aid system, it is stored in the fault memory after a time delay of two minutes. |
| The distance warning begins when reversing once the distance to an obstacle is about 1.5 m. The warning consists of sound pulses with a duration of about 75 ms. |
| The intervals between the sound pulses become proportionally shorter as the distance to the obstacle decreases. The sound pulses change into a continuous signal at a distance of less than 25 m ( the volume can be set with function 10 “Adaptation”). |
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