Division 4.2.4.1 On the road Original text. Later amendments are not shown. Warming up shall be performed by driving the vehicle only. 4.2.4.1.1Division 4.2.4.1.1 4.2.4.1.2Warming up and stabilization 4.2.4.1.3Criterion for stable condition ← Division 4.2.4 Division 4.2.4.1 Division 4.2.4.1.1 →