How do you top up the fluid in the anti pollution system of a fiat ulysse?

To top up the fluid in the anti-pollution system of a Fiat Ulysse, first locate the AdBlue or diesel exhaust fluid (DEF) reservoir, usually found near the engine bay. Open the cap and use a funnel to carefully pour in the appropriate DEF fluid until it reaches the recommended level. Ensure you do not overfill, and securely close the cap afterward. Always refer to the owner's manual for specific instructions and fluid specifications.