What must you know about catalytic converters?

Your selected combination of answers is correct because both statements highlight important aspects of how catalytic converters can be damaged under specific conditions related to engine starting.

The first statement emphasizes that towing a vehicle to start it can lead to damage if the catalytic converter overheats or if the exhaust system’s dynamics are disrupted. The second statement points out that repeated unsuccessful attempts to start a car can result in unburned fuel entering the catalytic converter, potentially causing thermal damage or contamination.

In the context of German traffic regulations, understanding the health and integrity of emission control systems like catalytic converters is crucial for maintaining environmental standards and ensuring vehicle safety. Damaged catalytic converters can also lead to increased emissions and failure in emissions tests required by law.

Missed information would include the third option, which inaccurately claims that unburned fuel cannot cause damage. Understanding that unburned fuel can indeed be detrimental to the catalytic converter is essential for proper vehicle maintenance and compliance with environmental regulations in Germany.