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The Message centre displays a distance countdown, when the DEF level becomes too low. The DEF should be topped up before the distance range falls to zero. Failure to do so, will result in the vehicle failing to start and the engine/transmission (amber) warning lamp will illuminate. If the lamp illuminates when the engine is running, there is an emissions-related fault with the engine or transmission. The vehicle can be driven, but may enter limp-home mode with the possibility of reduced performance. Seek qualified assistance as soon as possible. If the engine/transmission (amber) warning lamp illuminates after a refill, then the engine has to be started (run for approximately 30 seconds) and then stopped. Do this 3 times in succession. Two standard sized, non-drip refill bottles, each containing 1.89 litres of fluid, is the minimum amount required to restart the engine.
To perform a DEF top up procedure:
Locate the DEF reservoir. Remove the reservoir filler cap by turning it counter-clockwise.
- Place the refill bottle over the reservoir's filler cap aperture and turn clockwise, until it is locked into position.
- Press the base of the refill bottle, until all of the fluid has completely drained into the reservoir.
- Turn the refill bottle counter-clockwise and remove.
- Repeat the procedure with the second refill bottle.
- Replace the reservoir's filler cap and continually turn clockwise until hand tight.
So you ignored all the warning messages and ploughed on regardless?
If you run out of AdBlue your vehicle will not re-start after you switch off the engine – this is a requirement of EU6 emissions legislation and applies to all vehicles.
The tank will need to be refilled with a minimum of around 3-5 litres of AdBlue before the vehicle will start.