How to activate fuel heater timer with VDASH?
You have two options:
A/ with timer and additional heater = this option will show the timer in the menu and the heater will start automatically, when the outside temperature decrease to approx 5°C
B/ with timer only = the fuel heater will operate only, when you turn it on directly or with timer
Before you start, ensure, you have the CEM PIN for your car by connecting car to VDASH and check the CEM PIN status - see picture bellow... if not, follow this page: https://d5t5.com/article/volvo-cem-pin-code
To activate fuel heater timer follow these steps:
Once the change is done, please lock the car for 5-minutes.