How do you replace the windscreen motor arm on a Renault scenic?

To replace the windscreen motor arm on a Renault Scenic, first, disconnect the vehicle's battery to ensure safety. Remove the wiper arms by loosening the retaining nuts and gently pulling them off the splines. Next, access the windscreen motor by removing the necessary panels or covers, then disconnect the motor from its mount and wiring. Install the new motor arm by reversing the disassembly steps, ensuring everything is securely fastened before reconnecting the battery and testing the wipers.