If the windscreen wipers begin to move while you are changing the wiper blades, you can be trapped by the wiper arm.
![](../../assets/images/8161e75b57238615354ae3656178cc46_1_-----.png)
The wiper arms will move into the change position.
![](../../assets/images/bfe2693515bff628354ae36511b78cd8_1_-----.gif)
![](../../assets/images/0716773f4aac2d89354ae36544d8f580_1_-----.jpg)
![](../../assets/images/423969810b52a683354ae36531593424_1_-----.png)
If the colour of the maintenance display changes from black to yellow, the wiper blades should be replaced.
The duration until the colour changes varies depending on the usage conditions.