It doesn't have one...you have to pull the plug and check it like a differential....Jim........Transaxle Fluid Level Checking Procedure
DW260-070 Transaxle Fluid Plug Remover/Installer
1) Start the engine and allow the engine to idle for approximately 5 minutes , or, if possible, drive the vehicle for afew kilometers (miles) to warm the transaxle fluid. Check the fluid level when the transaxle is over 30°C (86°F) .
2) Press the brake pedal and move the shift lever through the gear ranges, pausing a few seconds in each range. Return the shift lever to the park position. (Left-Hand Drive Shown, Right-Hand Drive Similar.)
3) Raise and suitably support the vehicle.
4) Place a fluid container below the fluid level plug.
5) Remove the fluid level plug using the plug remover/installer DW260-070. Because the transaxle operates correctly over a range of levels, fluid may or may not drain out of the plug hole when the plug is removed.
6) Check the oil fluid level. If fluid does not drain through the plug hole after adding a total of 4 liters, then the transaxle was either underfilled or the transaxle is leaking fluid. Inspect the transaxle for fluid leaks. Fix any leaks before setting the transaxle fluid level.
7) Install the fluid level plug using the plug remover/installer DW260-070.
Tighten the Fluid Level Plug to 45 Nm (33 ft. lbs.) .
8) When the fluid level checking procedure is completed, wipe any fluid from the transaxle case with a rag or shop towel. Also, check that the fluid fill cap and the vent tube are properly installed.