Injury hazard from pinching and crushing, in extreme cases extremities can even be cut off when caught in windshield wiper mechanism. - AS82.30-Z-0001-01A

Always remove ignition key before working on windshield wiper mechanism. 

Injury hazard 

When working in the area of the windshield wiper mechanism with the ignition key in position "1" or "2" the wiper arm or wiper linkage can be pushed out of its end position and start running unintentionally  . This can result in severe injuries by cutting, pinching or crushing body parts.

Rules of behavior/protective measures 

• Always remove ignition key before working on windshield wiper mechanism.
• Secure operating range of mechanism against reaching in.
• Keep sufficient distance away from moving parts.
• Supervise hazard area.
• Wear tight fitting clothing and hair net.