@fashionci: It really does depend on the version of module @hex17 and the tank sensor arrangement on the car .
The traditional way of tank calibration on MQB platform cars (meaning moving the tank needle UP/DOWN) is via the adaptation channels with the parent name
Offset for tank calibration values.
Within this parent group there are 4 x Offset sensors (numbered 1 to 4). However, depending on how your car is equipped, the un-used sensors will have a factory value of 12.7L and the default value for used sensor(s) will be -12.8L. Note: this is an offset value; it's not an actual tank value.
Curiously, for some unknown reason - VCDS creates an additional channel
IDE02818-IDE02689-Offset for tank calibration values-Complete tank calibration which also has the default value -12.8L. This channel is missing in OBD11 - I have no idea why!!
Anyhow - the process for moving the tank needle is like this:
- Go to the hex17 module which is called Dashboard in OBD11, or Instrument in VCDS
- Go to security access and enter the magic number 20103 if you have an early module, or enter 47115 if the later module is installed
- Go to adaptation, enter "tank" into search box and select Offset for tank calibration values
- Select the Offset sensor that has a value -12.8 (usually Offset sensor 1)
- Adjust as desired- like this:
- Adjustment range is -12.8 to +8.
- Reducing (more negative) value moves the needle down (each -1 moves needle about 3mm to the left).
- increasing (less negative) value moves the needle up (each +1 moves needle about 3mm to the right)
If the car has more than one Tank sensor (like some Golf R models), repeat above for each active sensor, or try the VCDS channel for the "Complete tank calibration".
Don