The article below details the use of Ad Blue in a Fiat Ducato engine
Your motorhome uses diesel only, and this is located on the left-hand side of it. You need your truck key to open and re-lock the diesel cap. (refer to the video below)
All-new Fiat Ducato’s require Ad Blue and you will find the blue cap just below the diesel cap. Ad Blue is an exhaust fluid that reduces emissions. Tiny amounts of Ad Blue are injected into the flow of exhaust gases. You will be notified in the dash inside your motorhome when it starts to run low, and it will tell you how many km’s you have left before it runs out. Please ensure you do top it up when required or at your next convenience.
Please note:
If you do not top up your Ad Blue, your engine’s power and performance will be reduced, and your motorhome will eventually stop and will not start again until the Ad Blue is topped up. Another brand name of this product is “Go Clear”.