Do I need to change the oil in my Passat automatic transmission?

It is best to change the oil of automatic transmission in strict accordance with the requirements of the manufacturer, and it is best to change the standard oil in 4 s. There is no need to change the so-called good (expensive) oil yourself. The mileage depends on the manufacturer's requirements. Now there is an automatic gearbox with maintenance-free design, but Passat doesn't. It should be 2-3W kilometers. Check the instructions.

D gear will be a little shaky, because the clutch, that is, the hydraulic torque converter, has not been completely loosened, and N gear has been completely loosened. So, if you cut the D gear from N and release the brake, the car will have to wait for a while before it can slide forward. D is much faster. D gear can be understood as maintaining a little clutch, but automatic gear is non-contact force transmission, so there is no wear problem, just consuming some oil.

If it is normal for D gear to feel wobbly, the degree is mainly affected by engine idle speed and automatic clutch oil pressure control. Changing the transmission oil may help, but after all, these controls are to maintain power, not to shake. Therefore, as long as it is still mild, it should be normal. If you are not at ease, you can go to the 4s with good reputation at home to find a master to feel it.