2021-2026 Seat Leon 4 Door Practical tips -> 12-volt battery User Manual
MyCarUserManual.com
USER MANUALS FOR EVERY MAKE & MODEL

Practical tips -> 12-volt battery for Your Seat Leon 4 Door Fourth Generation (2021-2026)

Checking and refilling levels  
(PHEV hybrid vehicles) page 339 and is  
connected, some of the vehicle's functions  
are lost. These functions will require resetting  
after the battery is reconnected.  
›››  
CAUTION  
practically maintenance free. It is checked  
as part of the Inspection Service. Neverthe-  
less, check the terminals are clean and have  
the correct tightening torque, especially in  
summer and winter.  
Never mix an unsuitable antifreeze or other  
similar additives with the windscreen wash-  
er water. A greasy layer may be formed on  
the windscreen which will impair visibility.  
When disconnecting the battery from the ve-  
hicle on-board network, disconnect first the  
negative cable and then the positive cable.  
Use clean water with a window cleaner  
All work on batteries requires specialist  
knowledge. Please refer to a SEAT Official  
Service or a workshop specialising in batter-  
ies: risk of burns or exploding battery!  
recommended by SEAT.  
Deactivate the anti-theft alarm before you  
disconnect the battery. Otherwise the alarm  
will be triggered.  
If necessary, add a suitable antifreeze to  
the water in the reservoir.  
The battery must not be opened. Never try  
to change the fluid level of the battery. Oth-  
erwise explosive gas is released from the bat-  
tery that could cause an explosion.  
If the vehicle is not used for long periods  
CAUTION  
The vehicle has a system for monitoring the  
current consumption when the engine is left  
Do not mix cleaning products recommen-  
ded by SEAT with other products. This  
could lead to flocculation and may block  
the windscreen washer jets.  
unused for long periods of time page 342.  
›››  
Some functions, such as the interior lights, or  
the remote door opening, may be temporarily  
disabled to prevent the battery from running  
flat. These functions will come back on as  
soon as the ignition is switched on and the  
engine started.  
Battery warning indications  
When topping up service fluids, make ab-  
Wear eye protection.  
solutely certain that you fill the fluids into  
the correct reservoirs. Using the wrong flu-  
ids could cause serious malfunctions and  
engine damage!  
Battery acid is extremely corrosive. Wear pro-  
tective gloves and eye protection. Rinse any  
splashes of electrolyte with plenty of water.  
Lack of window washer fluid causes the  
Fires, sparks, open flames and smoking are  
prohibited.  
Winter conditions  
view through the windscreen to be ob-  
scured.  
During the winter, the starting power may be  
reduced, and if necessary, the battery should  
The battery should only be charged in a well-  
ventilated zone. Risk of explosion!  
be charged page 340.  
›››  
Keep children away from acid and batteries!  
12-volt battery  
WARNING  
Always follow the instruction manual.  
Any work to be done on the 12-volt vehicle  
battery or electrical system can cause in-  
juries, burns, accidents and fires:  
General information  
Disconnecting the battery  
»
The battery is located in the engine compart-  
The battery should only be disconnected in  
exceptional cases. When the battery is dis-  
ment page 329 or luggage compartment  
›››  
337  
Practical tips  
Control lamp  
Wear eye protection. Protect your eyes,  
the battery! The alarm will otherwise be  
triggered.  
skin and clothing from acid and particles  
containing lead.  
The control lamp lights up when the igni-  
tion is switched on. It should go out when the  
engine has started running.  
When disconnecting the battery from the  
Battery acid is extremely corrosive. Wear  
vehicle on-board network, disconnect first  
the negative cable and then the positive  
cable.  
protective gloves and eye protection. Do  
not tilt the batteries. This could spill acid  
through the vents.  
Indicator lamps and driver messages on the  
instrument cluster display or infotainment  
system:  
Switch off all electrical devices before  
Neutralise any electrolyte splashes on  
reconnecting the battery. Reconnect first  
the positive cable and then the negative  
cable. Never reverse the polarity of the  
connections. This could cause an electrical  
fire.  
the skin, eyes or clothing with a soapy solu-  
tion, and rinse off with plenty of water. If  
acid is swallowed by mistake, consult a  
doctor immediately.  
Defective alternator  
3 Valid only for: conventional vehicles.  
The control lamp lights up RED.  
Fires, sparks, open flames and smoking  
Never charge a frozen battery, or one  
are prohibited. When handling cables and  
electrical equipment, avoid causing sparks  
and electrostatic charge. Never short the  
battery terminals. High-energy sparks can  
cause injury.  
which has thawed. This could result in ex-  
plosions and chemical burns. Always re-  
place a battery which has frozen. A flat  
battery can also freeze at temperatures  
close to 0°C (+32°F).  
The vehicle battery stops charging from the  
alternator. You should immediately drive to  
the nearest specialised workshop.  
You should avoid using electrical equipment  
that is not absolutely necessary because this  
will drain the battery.  
A highly explosive mixture of gases is re-  
Ensure that the vent hose is always con-  
leased when the battery is under charge.  
The batteries should be charged in a well-  
ventilated room only.  
nected to the battery.  
Never use a defective battery. This could  
Error: the 12 V vehicle battery  
is not charging. Park safely!  
cause an explosion. Replace a damaged  
battery immediately.  
Keep children away from acid and bat-  
teries.  
The control lamp lights up RED.  
Before working on the electrical system,  
CAUTION  
Stop driving! Stop the vehicle at the next  
opportunity and in a safe place.  
you must switch off the engine, the ignition  
and all electrical devices. The negative ca-  
ble on the battery must be disconnected.  
When a light bulb is changed, you need on-  
ly switch off the light.  
Do not expose the battery to direct sun-  
light over a long period of time, as the in-  
tense ultraviolet radiation can damage the  
battery housing.  
The instrument cluster displays a message  
due to a DCDC failure (electrical, mechani-  
cal or energy balance).  
If the vehicle is left standing in cold con-  
Deactivate the anti-theft alarm by un-  
Switch the ignition off and seek professional  
assistance.  
ditions for a long period, protect the bat-  
tery from “freezing”. If it freezes it will be  
damaged.  
locking the vehicle before you disconnect  
338  

Related Topics

Popular Owner Manuals