It is mandatory to install an engine retarder in a commercial vehicle and a work vehicle whose permitted total weight is:
Pick an answer to test yourself
The correct answer: 8,000 kg or more.
An engine retarder is mandatory in a commercial vehicle or work vehicle with a permitted total weight of 8,000 kg or more. The values of 4,500 kg and 12,000 kg do not match the rule, and it does not apply at any weight.
