Driving correction and assistance systems
Depending on the vehicle, these may consist of:
- ABS (anti-lock braking system);
- ESC (Electronic Stability Control) with understeer control and traction control;
- emergency brake assist with, depending on vehicle, braking anticipation;
- rear-wheel steering.
These functions are additional aids in critical driving situations, to adapt the vehicle's behaviour to the driver's intentions.
However, these functions do not take over from the driver.
They do not extend the vehicle’s limits and must not encourage driving faster. They can therefore in no way replace the driver’s vigilance or responsibility during manoeuvres (the driver must always be alert to sudden events that may occur while driving).
ABS (anti-lock braking system)
During heavy braking, ABS prevents the wheels from locking, so you can control the stopping distance and keep control of the vehicle.
In these conditions, you can brake while steering to avoid obstacles.
This system also helps optimise stopping distances, especially on low-grip surfaces (wet roads, etc.).
Each time the system operates, the brake pedal pulsates. ABS does not in any case improve the "physical" performance related to tyre-to-road grip. Safe driving rules must therefore always be followed (distances between vehicles, etc.).
In an emergency, apply firm, continuous pressure to the pedal. Do not pump the brake pedal. The ABS will modulate the braking force applied in the braking system.Operating faults:
and
illuminated on the instrument panel
with the messages "ABS check", "Braking system check" and "ESC check": this indicates that the ABS, ESC and emergency brake assist are deactivated. Braking is still available;
,
,
and
illuminated
on the instrument panel with the message "Braking system fault": this indicates a fault in the braking system.
In both cases, consult a Brand Representative.
Your braking is partially ensured. However, braking abruptly is dangerous and requires you to come to an immediate and mandatory stop, compatible with traffic conditions. Contact an authorised dealer.
Hill start assist
This system assists when starting on a slope. It prevents the vehicle from rolling back, depending on the gradient, by automatically applying the brakes when the driver lifts their foot from the brake pedal to press the accelerator.
System operation
It only operates when the gear lever is in a position other than neutral (a position other than N or P for automatic gearboxes) and the vehicle is at a complete standstill (brake pedal pressed).
The system holds the vehicle for approximately 2 seconds. Then the brakes release gradually (the vehicle moves according to the gradient).
The hill start assist system cannot completely prevent the vehicle from rolling back in all cases (very steep gradients, etc.).
The driver can always apply the brake pedal to prevent the vehicle from rolling back.
Hill start assist must not be used for prolonged stops: use the brake pedal.
This function is not designed to immobilise the vehicle permanently.
If necessary, use the brake pedal to stop the vehicle.
The driver must remain particularly alert on slippery or low-grip surfaces and/or on slopes.
Risk of serious injury.
Electronic Stability Control (ESC) with understeer control and traction control system
Electronic Stability Control (ESC)
This system helps maintain control of the vehicle in "critical" driving situations (avoiding an obstacle, loss of grip in a bend...).
Operating principle
A steering wheel sensor detects the trajectory the driver intends to follow.
Other sensors located throughout the vehicle measure its actual trajectory.
The system compares the driver's intended path with the vehicle's actual trajectory and, if necessary, corrects the latter by acting on the braking of certain wheels and/or on engine power. When the system activates, the indicator
flashes
on the instrument panel.
Understeer control
This system optimises the action of the ESC in the event of pronounced understeer (loss of grip at the front axle).
Traction control system
This system helps limit wheel spin of the driven wheels and helps control the vehicle when starting, accelerating or decelerating.
Operating principle
Using wheel sensors, the system measures and compares the speed of the driven wheels at all times and detects wheel spin. If a wheel tends to spin, the system brakes that wheel until traction is again compatible with the grip available under the wheel.
The system also acts on engine speed according to the grip available under the wheels, independently of the action on the accelerator pedal.
Operating fault
When the system detects an operating fault, the message "ESC check" and the warning light
appear on the instrument panel.
In this case, ESC and the traction control system are deactivated. Contact a Renault dealer.

Deactivating the traction control function
In certain situations (driving on very soft ground: snow, mud, etc., or driving with snow chains fitted), the system may reduce engine power to limit wheel spin. If this effect is not wanted, the function can be deactivated by pressing switch 1.
The message "Traction control off" appears on the instrument panel to warn you.
As the traction control system provides additional safety, it is not recommended to drive with the function deactivated.
Leave this situation as soon as possible by pressing switch 1 again.
Note: the function is automatically reactivated when the ignition is switched on, or once the vehicle exceeds a speed of approximately 40 km/h.
Emergency brake assist
This is a system complementary to ABS that helps reduce the vehicle's stopping distances.
Operating principle
The system detects an emergency braking situation. In this case, brake assist immediately builds up maximum power and may activate ABS regulation.
ABS braking is maintained as long as the brake pedal is not released.
Hazard warning lights activation
Depending on the vehicle, these may come on under strong deceleration.
Operating fault
When the system detects an operating fault, the message "Braking system check" appears on the instrument panel, together with the warning light
.
Consult a Renault dealer.
Braking anticipation
Depending on the vehicle, when you release the accelerator pedal quickly, the system anticipates braking in order to reduce stopping distances.
Special cases
When using the cruise control:
- if you use the accelerator pedal, the system may activate when you release it;
- if you do not use the accelerator pedal, the system will not disengage.

Rear-wheel steering
On vehicles so equipped, this system steers the rear wheels according to driving conditions while the vehicle is moving: at low speed it favours manoeuvrability, at higher speed it optimises stability.
At low speeds, the rear wheels turn in the opposite direction to the front wheels (figure A) to improve manoeuvrability.
This is useful when driving in town, on winding roads, or manoeuvring in a car park, etc.

At speeds above 60 km/h, the rear wheels turn in the same direction as the front wheels (figure B) to optimise vehicle stability. This is useful when changing lanes, cornering, etc.
Operating faults
- If the

warning light appears together with the message "Steering check" on the instrument panel: consult a Renault dealer. - If the

warning light appears together with the message "Steering fault" on the instrument panel, this indicates a system fault.


requires you to stop immediately and as soon as traffic conditions allow. Contact a Renault dealer.
If the underbody of the vehicle is struck (for example, against a kerb, a raised pavement or any other street furniture), you may damage the vehicle (deformation of an axle).
To avoid any risk of an accident, have your vehicle checked by a Brand Representative.
Test yourself
A quick Renault Laguna quiz: every answer comes with an explanation and a link to the manual page.