Through the transmission dipstick where you also check your levels. You will need a small funnel that can be purchased at your local auto parts store.
Check transmission fluid level (auto) Change transmission fluid and filter (auto)
Mercron v auto transmission fluid
You will have to remove the transmission pan that is on the bottom of the transmission to drain the fluid.
If it's a Sport Shift (auto), then you use Honda's auto transmission fluid. If it's a manual, Honda's manual transmission fluid. Use no other fluid in your Honda.
Std. transmission? Bad clutch? Auto transmission? Check transmission fluid level
Auto Transmission Fluid
The auto box on a Mercedes c180 has a dipstick to monitor fluid levels. This is important to prevent the fluid from falling to dangerous levels.
down the transmission dipstick tube
Auto or std.?
Auto transmission radiator has a cooling chamber for transmission fluid to circulate
I have an 07, and ford calls for mercon iii / dex auto tranny fluid