Should I use M+ or M- when going uphill in M mode?

[McLouis]

You should use M- when driving uphill. The M mode is the manual mode of an automatic transmission. When engaged in this mode, you can upshift at high speeds and downshift at low speeds. Other gear positions of an automatic transmission include P, R, N, D, etc. Here is some relevant information about automatic transmissions: Introduction: As the name suggests, an automatic transmission does not require the driver to manually shift gears. The vehicle will automatically select the appropriate gear based on driving speed and traffic conditions. Generally, there are six gear positions in an automatic transmission car, from top to bottom: P, R, N, D, S, L. Working principle: The engine's power is transmitted through the gearbox, which is also a key factor affecting fuel consumption. Generally, automatic transmissions consume over 10% more fuel than manual transmissions. Whether manual or automatic, the more gears a transmission has, the more fuel-efficient it is.