2025-2026 Audi A5 4 Door Driving -> Starting the vehicle User Manual
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Driving -> Starting the vehicle for Your Audi A5 4 Door Third Generation (2025-2026)

Driving  
Turning on or off  
Driving  
If you would like to only turn the ignition on or  
off without starting the engine, follow these  
steps:  
Starting the vehicle  
Convenience key  
Applies to: vehicles with convenience key  
START ENGINE STOP  
Press the  
button without  
pressing the brake pedal.  
Turning off the ignition automatically  
To prevent the vehicle battery from draining, the  
ignition and possibly the exterior lighting may  
turn off automatically.  
Requirements:  
The Start/Stop system must have stopped the  
engine.  
Fig. 88 Center console: starting the engine  
You must have left the vehicle for longer than  
30 seconds.  
Requirement: the key must be in the vehicle.  
The ignition must be turned on.  
Starting the engine  
Among other indicators, the system detects that  
you have left the vehicle based on the following  
factors:  
Press and hold the brake pedal.  
START ENGINE STOP  
Press the  
button. The en-  
gine will start.  
The driver's door has been opened.  
Equipment that uses a lot of electricity is turned  
off temporarily when you start the engine. If the  
engine does not start immediately, the starting  
procedure stops automatically after a short time.  
If this is the case, repeat the starting procedure  
after approximately 30 seconds.  
The driver's safety belt has been unbuckled.  
The brake pedal is not being pressed.  
The ignition will also be turned off after 30 mi-  
nutes or if you lock the vehicle from the outside.  
WARNING  
Stopping the engine  
To reduce the risk of asphyxiation, never al-  
low the engine to run in confined spaces.  
Never turn off the engine before the vehicle  
has come to a complete stop and the “P” po-  
sition is engaged. The full functionality of  
the brake booster and power steering may  
not be available. You would then need to use  
more force to steer and brake the vehicle.  
The fact that you cannot steer and brake as  
usual may increase the risk of accidents and  
serious injuries.  
Bring the vehicle to a full stop.  
START ENGINE STOP  
Press the  
button. The en-  
gine will turn off.  
Applies to: vehicles with steering lock: The steer-  
ing is locked when you turn off the engine and  
open the driver's door. The steering lock helps  
prevent vehicle theft. The “P” position must be  
engaged on vehicles with an automatic transmis-  
sion.  
Secure the vehicle against rolling before ex-  
iting the vehicle ðpage 98.  
Stopping the engine in an emergency  
If necessary in an emergency, the engine can also  
be stopped while driving using the emergency off  
function*.  
Note  
Avoid high engine speed, full throttle, and  
heavy engine load if the engine has not  
START ENGINE STOP  
Press the  
button twice in  
a row or press and hold it one time.  
97  
Driving  
reached operating temperature yet. You  
you must also hold the vehicle key against the lo-  
could damage the engine.  
cation shown ðpage 97, fig. 88.  
If the engine has been under heavy load for  
an extended period of time, heat builds up  
in the engine compartment after the engine  
is turned off and there is a risk of damaging  
the engine. For this reason, let the engine  
run at idle for approximately two minutes  
before shutting it off.  
If the malfunction remains, drive immediately to  
an authorized Audi dealer or authorized Audi  
Service Facility to have the malfunction correct-  
ed.  
When driving  
Starting to drive, stopping, and parking  
Tips  
Starting from a stop  
Brief noises are normal when starting and  
parking the vehicle and are no cause for  
concern.  
Press and hold the brake pedal.  
Start the engine.  
Select the “D” or “R” position.  
Release the parking brake.  
Release the brake pedal. The vehicle may roll.  
Press the accelerator pedal to accelerate.  
For up to 10 minutes after stopping the en-  
gine, the radiator fan may turn on again au-  
tomatically or it may continue to run, even if  
the ignition is turned off.  
It may not be possible to start the vehicle in  
extremely low temperatures.  
Securing the vehicle against rolling  
Secure your vehicle to prevent it from rolling be-  
fore exiting the vehicle.  
Power will be fully available once the engine  
is at operating temperature.  
Set the parking brake.  
Messages  
Select the “P” position.  
If parking on a steep road, turn the steering  
The following messages may appear, depending  
on the vehicle equipment:  
wheel so that your vehicle will roll against the  
curb in case it should start to move.  
Engine start system: malfunction! Please  
If one of these measures is not possible, for ex-  
ample because there is no vehicle power, you  
must secure your vehicle against rolling using ad-  
ditional measures.  
contact Service  
There is a malfunction in the engine start system.  
Drive immediately to an authorized Audi dealer  
or authorized Audi Service Facility to have the  
malfunction corrected.  
Only park the vehicle on a level surface.  
Use suitable objects to block the front and rear  
wheels.  
Remote control key: key not detected. Is the  
Set the parking brake before selecting the “P” po-  
sition. This prevents too much stress from being  
put on the locking mechanism when parking on a  
steep surface.  
key still in the vehicle?  
The vehicle key was removed from the vehicle  
while the engine is running. If the vehicle key is  
no longer in the vehicle, you cannot turn on the  
ignition or start the engine once you stop it. You  
also cannot lock the vehicle from the outside.  
WARNING  
Always set the parking brake when leaving  
your vehicle, even if only for a short period  
of time. If the parking brake is not set, the  
vehicle could roll, increasing the risk of an  
accident.  
Remote control key: hold back of key  
against the designated area. See owner's man-  
ual  
The battery in the vehicle key may be drained or  
there may be a malfunction. To start the vehicle,  
98  

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