How do you check gearbox oil on a a160?

To check the gearbox oil on a Mercedes-Benz A160, first ensure the vehicle is on a level surface and the engine is warm. Locate the gearbox dipstick or fill plug, usually found on the side of the gearbox. Remove the dipstick or plug and wipe it clean, then reinsert it without screwing it in to check the oil level; it should be within the marked range. If the level is low, add the appropriate oil through the fill plug until it reaches the correct level.