Where is the radiator cap on a 2002 vw passat v6?

On a 2002 VW Passat V6, the radiator cap is located on the coolant reservoir, which is typically found near the front of the engine bay on the driver's side. The reservoir is a translucent plastic tank with a cap that can be identified by a coolant symbol. To access it, simply open the hood and look for the tank, then carefully remove the cap to check or add coolant.