Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2024Q4 E-TRON PREMIUM, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSGENERAL, TECHNICAL DATA (REFRIGERANT R744 GENERAL INFORMATION)00 GENERAL, TECHNICAL DATATECHNICAL AND PHYSICAL PRINCIPLESPHYSICAL CHARACTERISTICSPOSSIBLE DANGERS OF REFRIGERANT R744
2024 Audi Q4 e-tron Premium, AWD
Possible Dangers Of Refrigerant R744
2024 Audi Q4 e-tron Premium, AWDSECTION Possible Dangers Of Refrigerant R744
- Carbon dioxide is a naturally occurring gas. It makes up approximately 0.039 % of the surrounding air and in its gaseous state, it is colorless and largely odor- and tasteless. This makes it undetectable to human sensory organs.
- Fluid evaporating quickly can cause frostbite.
- Carbon dioxide in its gaseous state is approximately 1.5 times heavier than the surrounding air. As a result, it collects in low-lying areas, such as work pits, cellars, etc. It can linger there for many hours if there is little air circulation.
- Carbon dioxide is not considered to be poisonous; however, higher concentrations in the air (3 -5 %) can cause headaches, light-headedness, dizziness, drowsiness and nausea.
- Concentrations over 5 % can cause loss of coordination and unconsciousness.
- Concentrations over 8 % can cause respiratory arrest and death.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.