2021 VOLKSWAGEN T-ROC key battery

Never leave children or people requiring assistance alone in the vehicle. They could become trapped
in the vehicle in an emergency and may not be able to get themselves to safety. For example, locked
vehicles may be subjected to very high or very low temperatures depending on the season. This can
cause serious injuries and illness or fatalities, especially in the case of small children.
Never switch off the ignition while the vehicle is in motion. The steering column lock or steering lock
mechanism may be activated and you will no longer be able to steer the vehicle.

NOTICE
Every electric vehicle key contains electronic components. Protect the key from damage, moisture
and excessive vibration.
Replacing the button cell

Fig. 51 Vehicle key: replacing the button cell.
Key to ⇒ Fig. 51 :
Cover.
Button cell.
Volkswagen recommends having the button cell changed at a Volkswagen dealership or by a
qualified workshop ⇒ .
Fold out the key bit.
Lever off the cover ⇒ Fig. 51① ⇒ .
Lever the button cell out of the battery compartment ⇒ Fig. 51② .
Press the new button cell into the battery compartment ⇒ .
Press the cover onto the housing ⇒ Fig. 51① .

DANGER
Swallowing batteries with a diameter of 20 mm or other button cells can result in serious or even
fatal injuries within a very short period of time.

Always keep the vehicle key, key ring with batteries, spare batteries, button cells and other batteries
that are larger than 20 mm out of the reach of children.
Call for medical help immediately you suspect that someone has swallowed a battery.

NOTICE
The vehicle key can be damaged if the button cell is not changed properly.
Unsuitable batteries can damage the vehicle key. Replace discharged batteries only with new
batteries of the same voltage rating, size and specification.
Make sure the polarity is correct when inserting the battery.

Dispose of discharged batteries in accordance with environmental regulations.
Synchronising the vehicle key
If you cannot lock or unlock the vehicle with the vehicle key, synchronise the vehicle key or replace
the button cell ⇒ Replacing the button cell .
Fold out the key bit.
Remove the cap on the driver door handle ⇒ Opening and closing the driver door manually .
Stand beside the vehicle.
Press the button on the vehicle key.
Unlock the vehicle using the key bit.
Fit the cap ⇒ Opening and closing the driver door manually .
The synchronisation process is complete.
Troubleshooting
Vehicle cannot be locked or unlocked
The remote control is subject to interference caused by obstacles, adverse weather conditions or
other transmitters operating in the same frequency range in the vicinity of the vehicle, e.g. mobile
devices.
OR: the central locking switches off briefly to protect it from overloading.
Close the driver door.
OR: synchronise the vehicle key ⇒ Synchronising the vehicle key .
Indicator lamp does not flash
If the indicator lamp in the vehicle key does not flash when a button is pressed, the button cell in the
vehicle key must be changed ⇒ Replacing the button cell .

Please note that the sensors in the door handles can be activated by a powerful jet of water or
steam if a valid vehicle key is simultaneously within the operating range. If at least one window is
open and sensor surfaces on the door handles are continuously activated, all windows will close. All
windows could open if the jet of water or steam is moved away from the door handle sensors briefly
and then moved back again ⇒  .

It may not be possible to lock or unlock the vehicle using the Keyless Access if the 12-volt vehicle
battery or button cell in the vehicle key is weak or discharged. The vehicle can be locked or unlocked
manually ⇒  .

If there is no valid vehicle key in the vehicle or if it is not detected, a corresponding message will be
shown on the instrument cluster display. This may occur if the vehicle key is exposed to interference
from another radio signal or is covered by another item, e.g. an aluminium case ⇒ Starting and
stopping the engine .
Anti-theft alarm
Depending on the vehicle equipment level, the vehicle may have an anti-theft alarm.
The anti-theft alarm is activated automatically when the vehicle is locked using the vehicle key.
The anti-theft alarm outputs acoustic and visual warning signals for up to five minutes.
When does the system trigger an alarm?
If a door is opened.
If the bonnet is opened.
If the boot lid is opened.
If the ignition is switched on with a valid vehicle key. (The alarm may sound briefly.)
If the 12-volt vehicle battery is disconnected.
If there is movement inside the vehicle (in vehicles with interior monitoring) ⇒ Interior monitoring
system and anti-tow alarm .
If the vehicle is lifted or towed (vehicles with anti-tow alarm) ⇒ Interior monitoring system and anti-
tow alarm .
If the vehicle is transported on a car ferry or by rail (vehicles with anti-tow alarm or interior
monitoring) ⇒ Interior monitoring system and anti-tow alarm .
If a trailer that is connected to the anti-theft alarm system is removed ⇒ Trailer towing .
Switching off the alarm
Unlock the vehicle using the unlocking button on the vehicle key.

OR: switch on the ignition using a valid vehicle key. A short alarm lasting around one second may
sound.
On vehicles with Keyless Access: grip the door handle ⇒ Unlocking or locking the vehicle with
Keyless Access .

The anti-theft alarm will not function correctly if the 12-volt vehicle battery is weak or discharged.
Interior monitoring system and anti-tow alarm

Fig. 60 In the roof console: sensors for the interior monitoring system (arrows).
If movements are detected in the vehicle interior when the vehicle is locked, the interior monitoring
system will trigger an alarm ⇒ Fig. 60 .
The anti-tow alarm will be triggered if the vehicle is lifted.
Switching on the interior monitoring system and anti-tow alarm
Close the stowage compartments in the roof console so that the sensors can function.
Close the windows, glass roof, doors and boot lid
Press the locking button once.
The interior monitoring system and anti-tow alarm are activated.
Temporarily switching off the interior monitoring system and anti-tow alarm
The interior monitoring and the anti-tow alarm can be switched off temporarily in the Vehicle
settings menu in the Infotainment system ⇒ Infotainment system controls and displays .
To avoid false alarms, deactivate interior monitoring and the anti-tow alarm in the following
situations:
If any people or animals are to remain inside the vehicle.
If the vehicle is to be loaded onto another vehicle, transported or towed away.
If the vehicle is to be parked in a car wash or a two-storey garage.
If one or more windows or the glass roof are fully or partly open.

Fig. 64 In the boot lid: open the holder for the warning triangle.

Fig. 65 In the boot lid: manual release mechanism for the boot lid.
First read and observe the introductoryinformation and safety warnings⇒Introduction 
Unlocking the boot lid manually
Turn the lock of the warning triangle holder 90° anticlockwise ⇒ Fig. 64 .
Open the warning triangle holder and remove the warning triangle.
Insert the key bit into the opening in the boot lid ⇒ Fig. 65  and press the release lever in the
direction of the arrow.
Troubleshooting
First read and observe the introductoryinformation and safety warnings⇒Introduction 
Boot lid cannot be opened or closed
Check whether the boot lid is blocked by an obstacle. The boot lid can be moved by hand. You will
need to use increased force for this.
The drive switches off automatically in order to prevent overheating if the boot lid is operated too
frequently in a short space of time. Until the drive has cooled down, the boot lid can be opened and
closed by hand using more force than usual.
When you tow a trailer, the electrical boot lid can only be opened and closed on the boot lid
⇒ Trailer towing .
The boot lid must be closed by hand if the 12-volt vehicle battery or fuse is disconnected or faulty.
All turn signals flash four times
The vehicle key used last is still in the vehicle.
Boot lid is stiff
At outside temperatures below freezing point, the opening mechanism cannot always lift the
partially opened boot lid automatically. In this case, guide the boot lid further up by hand.
Windows

Ensure that nobody obstructs the path of the window, especially if a window is being closed when
the roll-back function is not active.
The roll-back function does not prevent fingers or other body parts from being pressed against the
window frame and being injured.

The roll-back function is also activated if the windows are closed using the vehicle key for
convenience closing.
Troubleshooting
One-touch opening and closing does not work
One-touch opening and closing is deactivated if the 12-volt vehicle battery has been disconnected or
discharged while the windows were not fully closed. The function must then be reset:
Switch on the ignition.
Close all windows and doors.
Pull up the button for the respective window and hold it in this position for several seconds.
Release the button, then pull it up again and hold it in this position. The one-touch function is now
ready for operation again.
The one-touch function can be restored for individual windows or for several windows at the same
time.
Closing windows without roll-back function
Attempt to close the window again within a few seconds by holding the button. The roll-back
function will be deactivated for a small part of the path of the closing window.
If the closing procedure takes longer than several seconds, the roll-back function will be reactivated.
If it is still stiff or obstructed, the window will stop and open again automatically.
Please go to a qualified workshop if the window still cannot be closed.
Glass roof
Opening and closing the glass roof

Depending on the equipment level, the background lighting provides indirect light in various areas of
the vehicle interior.
The front footwell may also be illuminated.
The brightness of the background lighting can be adjusted in the Infotainment system in the Vehicle
settings menu ⇒ Infotainment system controls and displays .

The lights go out when the vehicle is locked or after a delay of a few minutes when the vehicle key is
removed from the ignition lock. This prevents the 12-volt vehicle battery from discharging.

Some settings can be stored in the user accounts of the personalisation function and therefore
change automatically when the user account changes ⇒ Personalisation .
Visibility
Wipers
Operating the wiper lever

Fig. 83 On the right of the steering column: operating the windscreen wipers.

Fig. 84 On the right of the steering column: operating the rear window wiper.
The wipers will work only when the ignition is switched on and the bonnet and boot lid are closed.
Move the wiper lever to the desired position ⇒ :

Remove the battery cover.
Remove the button cell.
Insert a new button cell of the same type, paying attention to the correct polarity.
Insert the battery cover into the remote control housing.
Slide the battery cover in the opposite direction of the arrow ⇒ Fig. 93  until it clicks into place.

DANGER
Swallowing batteries with a diameter of 20 mm or other button cells can result in serious or even
fatal injuries within a very short period of time.
Always keep the remote control key, key ring with batteries, spare batteries, button cells and other
batteries that are larger than 20 mm out of the reach of children.
Call for medical help immediately you suspect that someone has swallowed a battery.

NOTICE
The remote control contains electronic components. For this reason, protect the remote control
from moisture, excessive vibration and direct sunlight.
Unsuitable batteries can damage the remote control. Replace discharged batteries only with new
batteries of the same voltage rating, size and specification.
Make sure the polarity is correct when inserting the battery.

Dispose of discharged batteries in accordance with environmental regulations.

The battery in the remote control may contain perchlorate. Observe the applicable legislation
regarding disposal.
Driving
Notes on driving
Pedals