The tool is designed to measure the oil level of engine.• Applicable: 2009 AUDI A4, A5 and A6 with Engines 2.0L TFSI, 3.2L FSI and 4.2L FSI, and 2.0, 2.7, 3.0 TDI, 1.8, 2.0, 3.0 TFSI, 3.2, 4.2 FSI.