Mode selectors and assistance switches change how a vehicle responds, but the names are not standardised. One manufacturer's Comfort may resemble another's Normal. This page explains what these settings usually adjust, and where your manual must take over.
- System
- Drive modes, regen, driver assistance
- Purpose
- Adapt response, efficiency and support
- Manual check
- Driving, terrain and assistance chapters
Everyday drive modes
Common road modes include Eco, which softens accelerator response and may reduce climate output to save energy; Normal or Comfort as the default balance; and Sport, which sharpens throttle response, holds gears longer and may add steering weight or stiffen adaptive suspension. Individual or custom modes let you mix settings. A mode does not change the car's grip or braking ability, only how it responds to your inputs.
Snow, sand and terrain settings
Winter or snow modes typically soften power delivery and may start in a higher gear to reduce wheelspin. Off-road vehicles may offer terrain selectors, such as Land Rover's Terrain Response, with settings for mud, sand or rock that adjust traction control and gearbox behaviour. Low range, locking differentials and hill descent control appear on vehicles built for rougher ground; each has speed and surface limits listed in the manual.
Hill descent control and hill start assist
Hill descent control uses the brakes to hold a slow speed downhill, usually activated by a button showing a car on a slope. Hill start assist briefly holds the brakes as you move off on an incline and is often automatic. Neither replaces your own control of the vehicle.
Electric and hybrid settings
Electric and hybrid vehicles often let you choose regenerative braking strength, using paddles, a menu or a B position on the selector. Strong settings can enable one-pedal driving, where lifting off the accelerator slows the car significantly, sometimes to a stop. Brake lights may illuminate during strong regeneration, but behaviour varies, so check the manual before relying on it.
Stop-start, auto hold and stability control
- Automatic stop-start: an A inside a circular arrow. The engine may not stop if the battery is cold, the cabin needs heating or cooling, or the engine is not yet warm.
- Electronic parking brake: a (P) symbol on a switch; it may apply automatically when you switch off.
- Auto hold: often labelled HOLD or an A in a circle; holds the car at a standstill until you accelerate.
- Stability or traction control off: a skidding car with OFF. Most manuals recommend leaving it on, with limited exceptions such as freeing a car stuck in snow.
Switching off a safety system should be a deliberate, temporary choice made with the manual open, not an experiment on a public road.
Driver-assistance systems
Lane keeping assist, lane departure warning, blind-spot monitoring, autonomous emergency braking and adaptive cruise control are grouped as advanced driver-assistance systems. Under the EU General Safety Regulation (EU) 2019/2144, features such as Intelligent Speed Assistance became required on new vehicles registered from July 2024, and many can be switched off per journey but return on restart.
SAE J3016 defines six levels of driving automation, from Level 0 to Level 5. Most systems in showrooms today are Level 1 or Level 2: they support steering and speed, but the driver must supervise continuously and remain responsible.
| Control | Usual effect | Check in your manual |
|---|---|---|
| Lane assist button | Toggles steering support or warnings | Whether it resets each start |
| Speed-limit display | Shows or enforces detected limits | How to override or mute alerts |
| Assistance menu | Sensitivity and alert settings | Sensor limits in weather |
Where a general guide stops
If an assistance system reports it is unavailable, or a mode will not engage, the reason can range from dirty sensors to a fault. The display message and manual are the first references; a qualified technician is the next.