No, it is not recommended to use urine or any other type of liquid, other than the specified AdBlue solution, in the AdBlue tank. AdBlue is a urea-based fluid that is specifically formulated for use in diesel engines with selective catalytic reduction (SCR) technology to reduce emissions of nitrogen oxides (NOx) in the exhaust gas.
Urine or other liquids may damage the SCR system, the engine, and other parts of the vehicle, and may also void the vehicle’s warranty. Additionally, it’s also illegal to use any other liquid than AdBlue in the AdBlue tank in most countries.
It’s important to always use the correct fluid and to follow the manufacturer’s recommendations for refilling and maintenance of the AdBlue system. If you’re experiencing any issues with the AdBlue system, it’s best to contact the car manufacturer or a certified mechanic for assistance.