The next step in your diagnosis of where the draw is coming from is to disconnect each of the components that draw power from this fuse one at a time while monitoring the draw! This fuse supplies power to four modules on the vehicles, the remote climate control module, the instrument cluster, the multifunction (turn signal) switch, and the integrated (climate control) module! Below, I have attached illustrations of the locations of each of these connectors and the main wire diagram for power flow from the fuse! If you need assistance or instruction on how to access any of these connectors, let me know and I will attach the workshop manual instructions for removal of that component
Attachments are only available to registered users.
When you unplug one of these components, you will know that that is the component causing the draw, and if you replace that component, the draw will most likely be corrected!
OK, this will take some time so have some patience for me to collect this data for you
C228 (remote climate control module), C220 to follow!
Click on blue hyper link above
C220 (instrument cluster, which includes the finish panel and headlamp switch)
DOWNLOAD TRIM INSTRUCTIONS HERE
DOWNLOAD FINISH PANEL INSTRUCTIONS HERE
DOWNLOAD HEADLAMP SWITCH INSTRUCTIONS HERE
C202A (multifunction switch)
The reason they say to disconnect the battery ground is due to a safety issue for potential airbag deployment if you were to accidentally tamper with any air bag harnesses! Disregard that portion of the instructions if you feel comfortable, I have never seen an airbag deploy by not following these instructions!!!
I have attached the description for these codes below, it is possible that the level sensor is contaminated with sulfur, the only true fix for this would be to replace the sensor! This would be the cause of the fuel indicator not working however it is very unlikely that a stuck sender would cause the battery to drain down!
P0460 - Fuel Level Sensor A Circuit
P0461 - Fuel Level Sensor Circuit Range/Performance
P0462 - Fuel Level Sensor Circuit Low Input
No, that was just copied and pasted from the workshop manual and the hyper link will not work, it would just take you to the diagnostic tests that would be performed at the dealer, P0463 is relating to the same sender issue
Power is supplied to the cluster circuit for the park brake lamp at all times when the key is on, if the light is staying on, then it sounds like there is a short to ground on the switch side of the circuit! If I had this car in the shop, the first thing I would do is to unplug the park brake switch to see if the light goes out, if it doesn't then the next step would be to remove the cluster and unplug the electrical connector to see if the battery draw goes away! If it does, you will know that the problem is in the cluster!