Removing Fuel Level Sensor

Reach carefully past the fuel pump and feel for the sensor. This is located in front of the pump, pointing diagonally outwards.
Press the retainer spring on the sensor by hand while at the same time pulling the sensor up. → Loosening fuel level sensor

Fig 1: Identifying Sucking Jet Pumps And Fuel Level Sensors
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. Right sucking jet pump and holder clipped into floor holder
2. Right fuel level sensor clipped into floor holder
3. Left sucking jet pump and holder clipped into floor holder
4. Left fuel level sensor clipped into floor holder
Fig 2: Loosening Fuel Level Sensor
Courtesy of PORSCHE CARS NORTH AMERICA, INC.