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.
Safety Precautions When Working On SCR System: Notes
The reducing agent increases the risk of injury
Reducing agents may cause eye and skin irritation as well as injury to the respiratory system and possible poisoning.
-- Wear protective eyewear.
-- Wear safety gloves.
-- Wear protective work clothing.
-- In closed areas switch on the exhaust extracting system.
Never reuse reducing agent under any circumstances. For information on storage and disposal. Ask the importer about country-specific storage and disposal information.
Note the following when removing or installing any components of the SCR system:
- The reducing agent tank must be empty when working on the selective catalytic reduction system. When the reducing tank needs to be emptied, read the respective procedure description.
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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.