Get Starting & Driving -> Brake System Guide for Mg Zs SUV First Generation (2017-2024)

STARTING & DRIVING

Brake System

the car to a halt as quickly as trafﬁc conditions safely

allow, and do not pump the brake pedal as the braking

system will lose any remaining servo assistance.

Foot Brake

•

Once the engine has stopped it will lose any remaining

servo assistance, use suitable force to apply the brake

pedal to stop the car safely in the current trafﬁc

conditions. Contact an MG Authorised Repairer.

Efﬁciency of the brake servo booster can be affected

by numerous conditions, such as engine speed loss.

These conditions could result in extra force required

to operate the brake pedal to stop the car.

For added safety, the hydraulic braking system operates

through dual circuits. If one circuit should fail, the other

will continue to function, but greater pedal pressure will

be needed, and increased brake pedal travel, and longer

stopping distances will be experienced. In the event of a

brake failure where only one circuit is operational, the car

should be brought to a halt as soon as trafﬁc conditions

safely allow. DO NOT continue driving - seek an MG

Authorised Repairer.

Wet Conditions

Servo Assistance

Driving through water or heavy rain may adversely affect

braking efﬁciency. The SCS (Stability Control System)

includes a Brake Disc Wiping function which is activated

when the windscreen wipers are used. However, always

keep a safe distance from other vehicles and intermittently

apply the brake pedal in conditions where the wipers are

not used.

The braking system is servo assisted, always be aware of

the followings during the operation:

•

The servo assistance functions with the engine running

only. Never allow the car to coast with the engine

turned off.

•

Always take particular care when being towed with four

wheels on the ground and the engine turned off. If the

engine should stop for any reason while driving, bring

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Electronic Brake Force Distribution (EBD)

in an emergency situation the brakes are applied faster than

the limits set within the system, then full ABS application is

applied to bring the car to a stop in the shortest possible

distance.

Your car is equipped with Electronic Brake Force

Distribution, which, in order to maintain braking efﬁciency,

distributes braking forces between front and rear wheels,

under all load conditions.

Hill Hold Control (HHC)

EBD integrates a monitoring system. The monitoring

system is linked to the brake system malfunction indicator

lamp on the instrument pack. Refer to "Warning Lights

and Indicators" in "Instruments and Controls" section.

HHC has limitations when subject to adverse

conditions such as wet or icy surfaces and

steep slopes.

4

HHC is not a substitute for parking brake

application when carrying out a hill start.

DO NOT exit the vehicle with only HHC

applied, it may lead to a serious accident

when HHC releases.

If the indicator lamp illuminates while driving, or remains

illuminated after the START/STOP Switch is switched

ON/RUNNING, it indicates there is a failure with the

braking system, and EBD may be inoperative. In such a

case, stop the car as soon as safety permits and seek an

MG Authorised Repairer immediately. DO NOT drive the

car with the braking system malfunction indicator lamp

illuminated.

The car may roll if 'pull-away' is not achieved

immediately after releasing the brake pedal.

Always ensure the brake pedal is pressed or

electronic parking brake applied until drive is

taken up.

Electronic Brake Assistance (EBA)

Your car is equipped with Electronic Brake Assist, which

reacts to the speed at which the brake pedal is applied. If,

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STARTING & DRIVING

Firm application of the brake pedal when

stopping is required by HHC to generate

sufﬁcient brake pressure to maintain hold.

Note: HHC is available in both forward and backward

directions when pulling away on uphill slopes.

HHC assists the driver by 'holding' the vehicle during hill

starts.

The following conditions must be fulﬁlled to activate HHC:

•

The driver's door is closed and the driver seat belt is

fastened.

•

The vehicle is stopped on a slope for more than 2

seconds.

•

SCS is active and fault free.

EPB is released and fault free.

Clutch pedal is pressed (MT), or in D/R gear (AT).

START/STOP Switch is switched ON/RUNNING.

Sufﬁcient brake pedal application force has been applied.

If the driver releases the brake pedal on a hill, HHC will

maintain brake pressure for 1 - 2 seconds, after this period

the vehicle may roll backwards.

Note: HHC cannot overcome physical limitations. DO

NOT solely rely on HHC.

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STARTING & DRIVING

Hill Descent Control (HDC)

The HDC system is an auxiliary function specially designed

for driving on acute downhill gradients. The system

reduces the speed by applying brake force, thus assisting

the driver to drive on acute downhill surfaces with low

speeds.

The HDC system is only an auxiliary

function. It has limitations when subject to

adverse conditions such as wet or icy surfaces

and steep slopes. The HDC system cannot

overcome the laws of physics, always ensure

that the vehicle is driven down steep slopes

at low speeds.

Please DO NOT use this function when driving on the

ordinary roads.

When the HDC is working, the brake system may

generate strong vibrations or noise. It is normal during

the operation of HDC.

Even when the HDC system is switched on,

the driver must always pay close attention

to the driving state of the vehicle, and take

active control when necessary. In certain

cases, HDC may be suspended or switched

off temporarily.

4

Note: During the operation of the Hill Descent

Control (HDC) system, please engage a lower gear

on MT models to prevent the engine stalling; on AT

models, please do not move the shift lever to the "N"

position or the HDC function may be deactivated.

During some driving conditions on downhill

surfaces (e.g.

driving down

a

slope at

high speed or small slope, etc.), HDC is

inoperative, the driver must maintain control

of the vehicle at all times and use brake

applications to ensure safety.

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STARTING & DRIVING

HDC System On/Off

1

2

Standby: Press the HDC switch (ON) to set the

system into standby mode, the green HDC warning

lamp in the instrument pack will illuminate.

Operation whilst in Standby mode, when the vehicle

is driven down an acute gradient, if the vehicle speed

is low, the HDC system will automatically enter

the operating state. In this case, the HDC warning

lamp in the instrument pack ﬂashes green, this may

be accompanied by the working noise of the brake

system. The HDC system will attempt to control the

vehicle drive down the steep slope smoothly.

3

4

Temporary Deactivation: Press the accelerator or

brake pedal beyond a preset limit whilst in operating

mode and the HDC system will temporarily suspend

operation.

When the START/STOP Switch is switched

ON/RUNNING, HDC system defaults to off. Use the

switch function within the infotainment system to turn

the HDC system on/off.

Off: Press the HDC switch (OFF) to switch the system

OFF, the green HDC warning lamp in the instrument

pack will extinguish.

Note: HDC system can work in both forward and

backward directions.

Normally, HDC system has four states:

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STARTING & DRIVING

Note: During HDC system operation the braking

system will automatically pressurise and maintain

pressure. Operation of the brake pedal during this

phase may result in a 'kickback' sensation through the

pedal. This is normal for HDC operation.

Anti-lock Brake System (ABS)

ABS cannot overcome the physical

limitations of stopping the car in too short

a distance, cornering at too high a speed, or

the danger of aquaplaning, i.e. where a layer

of water prevents adequate contact between

the tyres and the road surface.

HDC ON/Malfunction Indicator Lamp

Refer to "Warning Lights and Indicators" in "Instruments

and Controls" chapter.

The purpose of the anti-lock braking system (ABS) is to

prevent the wheels from locking while braking, thereby

enabling the driver to retain steering control of the car.

4

The fact that a car is ﬁtted with ABS must never tempt

the driver into taking risks that could affect his/her safety

or that of other road users. In all cases, it remains

the driver's responsibility to drive within normal safety

margins, having due consideration for prevailing weather

and trafﬁc conditions.

Under normal braking conditions, ABS will not be

activated. However, once the braking force exceeds the

available adhesion between the tires and the road surface,

thereby causing the wheels to lock, ABS will automatically

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come into operation. This will be recognisable by a rapid

pulsation felt through the brake pedal.

No matter how hard you brake, you are still able to

continue steering the vehicle as normal.

IMPORTANT

Braking in an Emergency

ABS can not reliably make up for the driver's

mis-operation or lack of experience.

DO NOT pump the brake pedal at any time;

this will interrupt the operation of ABS and

may increase the braking distance.

ABS Malfunction Indicator Lamp

If an emergency situation occurs, the driver should apply

full braking effort even when the road surface is slippery.

ABS will ensure that the wheels do not lock and that the

car is brought to a halt in the shortest possible distance for

the prevailing road surface conditions.

Refer to "Warning Lights and Indicators" in "Instruments

and Controls" section.

Note: The normal (non-ABS) braking system remains

fully operational and is not affected by partial or

full loss of ABS. However, the braking distances may

increase.

Note: On soft surfaces such as powdery snow, sand

or gravel, the braking distance produced by the ABS

system may be greater than that for a non-ABS system,

even improved steering would be experienced. This is

because the natural action of locked wheels on soft

surfaces is to build up a wedge of material in front of

(or to the side of, if steering) the tyre contact patch.

This effect assists the car to stop when braking or to

change direction when steering.

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STARTING & DRIVING

*

Auto Hold

DO NOT leave the vehicle when the engine

is operating and the auto hold is active.

When auto hold stops the vehicle, for reasons

such as engine shut-down, releasing the

seat belt or pressing the auto hold switch,

the electronic parking brake is applied. It

cannot be guaranteed that the vehicle will

be stabilised in all cases. For example, the

rear wheels are on a slippery road surface,

or the vehicle incline is too great (larger than

20%). Please make sure that the vehicle is

safely stabilised prior to exiting.

Auto hold cannot guarantee the electronic

parking brake operation in all cases where

the power system is shut down. Please ensure

the electronic parking brake is applied and

the vehicle is stabilised prior to exiting the

vehicle.

4

The auto hold function should be switched off

during the use of automatic car washes, the

electronic parking brake may suddenly apply

and cause vehicle damage.

DO NOT take any extra risks when driving

due to the fact the vehicle is ﬁtted with

additional convenience functions. The driver

should pay full attention and observe the

surroundings even if the vehicle is equipped

with auto hold system.

If the vehicle is required to stop frequently for a length

of time (such as trafﬁc lights, trafﬁc queues or stop/start),

and the engine is running, the auto hold system assists in

stabilising the vehicle, enabling you to remove your foot

from the brake pedal when the vehicle is stationary and

the Auto Hold active.

The auto hold function cannot guarantee the

stability of the vehicle when starting off or

braking on hills especially on slippery or icy

surfaces.

Auto hold has 3 main states:

1

Off: Function in Off state.

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STARTING & DRIVING

2

Standby: Function in Standby state. The function is

active but the vehicle has not stopped. Once the

vehicle has stopped, and all other conditions are met,

the system will automatically select Park.

With the driver's seat belt fastened, the door closed and

the engine running, press the auto hold switch to switch

the auto hold function from Off to Standby state.

With the brake pedal ﬁrmly pressed and the vehicle

completely stopped, the auto hold function will switch

from the Standby state to the Parking state.

3

Parking: Function in Parked state. In this state the

green

indicator on the instrument pack illuminates.

When the auto hold is in the Parking state, engaging

forward or reverse gear and pressing the accelerator will

automatically release the auto hold function.

In some circumstances such as releasing the seat belt,

switching off the engine or remaining static for a length

of time it will result in the vehicle exiting the auto hold

Parking state. At this time the electronic parking brake

will remain applied and will require the driver to release

it using the switch.

Note: With the brake pedal pressed, operating the

switch to turn the auto hold off, the system will NOT

apply the parking brake.

Note: It is recommended to turn off the auto hold

function when reversing into the garage.

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STARTING & DRIVING

Emergency Braking Hazard Warning Lights

Control (HAZ)

Active Rollover Protection (ARP)

The ARP system cannot overcome the laws of

physics. It is a driver aid to assist the stability

of the vehicle and under extreme conditions.

It is not a guarantee that the car will not roll

over.

If the vehicle is travelling in excess of 31 mph (50 km/h)

and the driver makes an emergency braking manoeuvre,

the hazard lights will be operated to indicate this to other

drivers.

Note: If the hazard warning lights are being operated

manually, this suspends the HAZ function.

In cases where the vehicle has a high centre of mass, rapid

or excessive dual direction lane changing may create a

roll condition. ARP may use the braking system to apply

certain brakes to try and correct the condition and assist

in preventing rollover.

4

When the emergency braking manoeuvre is exited (no

severe deceleration detected) then the function will be

switched off after a few seconds.

Note:

During ARP application the steering

Note: As the car speed drops to below 6 mph (10 km/h)

and the system no longer ﬂashes the brake lamps, the

hazard warning lamps will illuminate automatically.

Short press the hazard warning lamp switch or increase

your speed to above 12 mph (20 km/h) for 5 s to switch

off the hazard warning lamps.

characteristics of the vehicle may be noticeably

different from normal.

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STARTING & DRIVING

*

Parking Brake

The parking brake operates on the rear wheels only. To

apply the parking brake, pull the lever up. Always apply the

parking brake fully whenever you park the car.

DO NOT drive with the parking brake

applied, or apply the parking brake while

the car is in motion. This could result in loss

of control, prevent the ABS from functioning

correctly, and may even cause damage to

the rear brakes.

To release, pull the lever up slightly, press the button

(arrowed in illustration) and fully lower the lever. When

parking on a steep slope, do not rely on the parking brake

alone to hold the car.

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STARTING & DRIVING

Electronic Parking Brake (EPB) ^*

Applying the EPB

While the vehicle is stationary, the EPB can be applied.

Ensure the EPB is applied every time the vehicle is left or

parked.

In the event of EPB malfunction where EPB

release is not possible, please consult an MG

Authorised Repairer in order to carry out an

emergency manual release of the parking

brake.

•

Press the brake pedal, pull the EPB switch upward until

the indicator in the EPB switch illuminates.

If the indicator in the EPB switch and the indicator in

the instrument pack illuminates,

the EPB is applied.

P

If the EPB malfunction indicator lamp

in the

4

instrument pack remains on, it indicates that a fault

has been detected. Please contact an MG Authorised

Repairer immediately.

Note: An audible motor noise may be heard when

applying or releasing the EPB.

IMPORTANT

•

In the event of a ﬂat battery or power failure, it is not

possible to apply or release the EPB. In such a case,

'jump leads' shall be used for emergency engine start,

please refer to "Emergency Starting" in "Emergency

Information" chapter.

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STARTING & DRIVING

Releasing the EPB

When the car is in motion, in case of any emergency, such

as the car can not be stopped by the brake pedal, it can be

decelerated by pulling up and holding EPB switch.

•

Switch on the ignition, press the brake pedal, and press

the EPB switch.

•

Pull the EPB switch upward and hold to realise the

emergency braking. Continuous acoustic alarm will

sound simultaneously during emergency brake.

To cancel the emergency braking process, release the

EPB switch.

•

If the indicator in the EPB switch and the indicator in

the instrument pack

released.

are extinguished, the EPB is

•

Start Assist

The EPB can predict the driver's intention and

automatically release the EPB.

If the driver's seat belt is fastened, the engine is started

up, D or R gear is selected and the accelerator pedal is

depressed for start off, the EPB will automatically release.

Emergency Braking Function

Inappropriate use of the EPB can lead to

accidents and injuries. Do not apply the EPB

for vehicle braking, unless in emergency.

During emergency braking using the EPB, DO

NOT switch off the ignition, this could result

in serious injury.

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Starting & Driving -> Brake System for Your Mg Zs SUV First Generation (2017-2024)

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