2021 VOLKSWAGEN UP! change key battery

Fig. 18 Indicator lamp in the vehicle key
First read and observe the introductoryinformation and safety warnings⇒
Introduction
If a button on the vehicle key is pressed briefly, the indicator lamp ⇒ Fig. 18 (arrow) flashes once.
The lamp will flash several times if the button is pressed and held, e.g. convenience closing of the
electric panorama sliding/tilting glass roof.
If the indicator lamp in the key does not light up when a button is pressed, the battery in the key
should be replaced ⇒ Replacing the battery.
Replacing the battery
Fig. 19 Vehicle key: opening the battery case cover
Fig. 20 Vehicle key: removing the battery
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Volkswagen recommends having the battery changed by a qualified workshop.
The battery is located on the rear side of the vehicle key underneath a cover.
Replacing the battery
•Fold out the key bit of the vehicle key ⇒ Opening and closing the key bit.
•Pull up the cover on the rear side of the vehicle key ⇒ Fig. 19 in the direction of the arrow ⇒.
•Using a suitable thin object, lever the battery out of the battery compartment ⇒ Fig. 20.
•Insert the new battery as shown ⇒ Fig. 20 and push it into the battery compartment against the
direction of the arrow ⇒.
•Fit the cover as shown ⇒ Fig. 19 and push it onto the vehicle key housing against the direction
shown by the arrow until it engages.
Dispose of discharged batteries in accordance with regulations governing the protection of
the environment.
The battery on the vehicle key may contain perchlorate. Please comply with any legal
requirements and regulations when handling and disposing of these batteries.
Synchronising the vehicle key
First read and observe the introductoryinformation and safety warnings⇒
Introduction
It may no longer be possible to lock or unlock the vehicle with the remote control if the  button
is pressed repeatedly outside of the effective range of the vehicle key. If this is the case, the vehicle
key should be re-synchronised as follows:
•Fold out the key bit of the vehicle key ⇒ Opening and closing the key bit.
•The vehicle key can be damaged if the battery is not changed properly.
•Unsuitable batteries can damage the vehicle key. Discharged batteries should only be
replaced with new batteries of the same voltage rating, size and specification.
•Ensure that the battery is fitted the right way round.
NOTICE

Practical tips
Frequently asked questions
If you suspect that there is a fault in the vehicle or if your vehicle has been damaged, read and
observe the following information before contacting a Volkswagen dealership or qualified
workshop. You may also find useful information in the index under the headings Things to note or
Checklist.
IrregularitySome possible causesPossible solution
Engine does not start.
Vehicle battery is discharged.
– Jump start the engine ⇒ Starting the
engine with jump leads.
– Recharge the vehicle battery
⇒ Vehicle battery.
An incorrect vehicle key is
being used.
Use a valid vehicle key ⇒ Vehicle key
set.
The fuel level is too low.Fill the tank ⇒ Filling the tank.
Vehicle cannot be locked
or unlocked with the
vehicle key.
– The battery in the vehicle
key is discharged.
– The vehicle key is too far
away from the vehicle.
– Replace battery ⇒ Vehicle key set.
– Move closer to the vehicle.
– Synchronise vehicle key ⇒ Vehicle
key set.
– Unlock or lock vehicle manually
⇒ Manual opening and closing.
Unusual noises.
Cold engine, brake assist
systems, electronic steering
column lock, auxiliary heater,
filling up with natural gas.
Refer to the index under entries for
Noises.
Unusual handling.
Assist systems are active.Refer to the index under entries for
Assist systems.
An incorrect tyre pressure is
being used.
Check tyre pressure ⇒ Wheels and
tyres.
Damage to the tyre or wheel.
Check the rims and tyres regularly for
damage ⇒ Wheels and tyres and
replace as necessary ⇒ Changing a
wheel.
The vehicle has no
vehicle jack, spare wheel
or breakdown set.
Equipment depends on type
of vehicle.
No direct solutions possible as it
depends on the equipment level.
Contact a Volkswagen dealership if
necessary ⇒ Vehicle toolkit.
The road ahead is not lit
up properly.
– Headlight has been masked
for driving on the left or on the
right.
– Headlight not adjusted
correctly.
– Bulbs have failed.
– Dipped beam headlight not
switched on.
– Mask the headlights accordingly for
driving on the left or right ⇒ Lights.
– Adjust headlight range ⇒ Lights.
– Change bulbs ⇒ Changing bulbs.
– Switch dipped headlights on
⇒ Lights.
Electrical consumers not
working.
Low vehicle battery charge.Recharge vehicle battery ⇒ Vehicle
battery.
Low fuel level.Fill the tank ⇒ Filling the tank.
Fuse blown.Check fuse and replace as necessary
⇒ Fuses.
Fuel consumption is
higher than indicated.
– Short distances driven.
– Uneven acceleration.
– Avoid driving short distances.
– Think ahead when driving.
– Accelerate evenly.
An electrical consumer is
switched on.
Switch off all consumers that are not
needed.
Fault in engine management
system.
Have the fault rectified ⇒ Engine
management system and exhaust
purification system.
Tyre pressure too low.Adjust the tyre pressure ⇒ Wheels
and tyres.
Driving in hilly regions.No direct solutions possible.
Driving with a heavy load.No direct solutions possible.
Driving at high engine speed.Select a high gear.
In an emergency
 Introduction
This chapter contains information on the followingsubjects:
⇒ Making you and your vehicle safe
⇒ First aid kit, warning triangle and fire extinguisher
Additional information and warnings:

⇒ Fitting the front towing eye
⇒ Driving tips when towing
Observe any legal requirements when towing or tow-starting.
For technical reasons, vehicles with a discharged battery must not be tow-started.
For technical reasons, vehicles with an automated manual gearbox must not be tow started
unless it has been ascertained that the gearbox is in position N⇒ When a vehicle with an
automated manual gearbox has to be towed:.
Towing a vehicle when the engine is switched off and the ignition is switched on discharges the
vehicle battery. In some vehicles battery charge level, the drop in voltage can be large enough after
just a few minutes that electrical consumers in the vehicle will no longer function, e.g. the hazard
warning lights.
Additional information and warnings:
•Exterior views ⇒ Exterior views
•Changing gear ⇒ Changing gear
•Engine management system and exhaust purification system ⇒ Engine management system
and exhaust purification system
•Starting the engine with jump leads ⇒ Starting the engine with jump leads
You will not be able to fit a towing eye onto the rear bumper. The vehicle is not suited for
towing other vehicles.
Notes on tow-starting
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Vehicles should not be tow-started wherever possible. Use jump leads to start the engine
instead⇒ Starting the engine with jump leads.
For technical reasons, the following vehicles cannot be tow-started:
•If the vehicle battery has discharged, the engine control unit will not function properly.
However, if the vehicle still has to be tow-started (manual gearbox):
•Engage 2nd or 3rd gear.
•Keep the clutch pressed down.
Never tow a vehicle that has no power supply.
•Never remove the key from the ignition. This could cause the steering lock to engage
suddenly. You will no longer be able to steer the vehicle. This can lead to a loss of control
of the vehicle, accidents and serious injuries.
•If the power supply to the towed vehicle is disconnected, stop towing immediately and
seek expert assistance.
WARNING
If a vehicle is being towed, the vehicle handling and braking effect will change significantly.
Please note the following in order to reduce the risk of an accident or serious injuries:
•Notes for the driver of the towed vehicle:
- You will need to depress the brake pedal more vigorously than normal as the brake
servo is not working. Always be careful not to drive into the vehicle that is pulling your
vehicle.
- You will need to turn the steering wheel more vigorously as the power-assisted
steering function is not working.
•Notes for the driver of the towing vehicle
- Accelerate carefully and gently.
- Avoid sudden braking and driving manoeuvres.
- Brake earlier than normal by pressing lightly on the brake pedal.
WARNING
•Remove and install the cover and the towing eye carefully so as to avoid damage to the
vehicle, e.g. the paintwork.
•Unburnt fuel can enter the catalytic converter and damage it while the vehicle is being
towed.
NOTICE