21 The following technical items of special importance apply to both the running- in period and to the period thereafter. While driving, check the instrument panel regularly and take appropriate action if you notice anything unusual, such as strange engine and transmission noises, smoke, or poor performance. Do not let the engine idle for longer than necessary. . This is harmful to the engine and also causes unnecessary pollution of the environment. Before switching off the engine after a long trip or when the engine has been subjected to high loading , let it idle for at least 5 minutes.
It is important to let the engine run for a while in order to prevent the coolant temperature becoming too high and to allow the turbocharger to cool down. To prevent damage to the vehicle, the following instructions must be strictly observed. During the running-in period it is best not to subject the new vehicle to excessive loads. This also applies when an overhauled engine, gearbox or differential has been installed. Therefore, for the first 1,500 km (932 miles): drive carefully and avoid accelerating sharply. After a cold start continue to drive in a low gear and at a moderate engine speed until the engine coolant temperature is out of the blue zone.
Be aware that engine stalling while driving will lead to power steering failure. Consequently, the vehicle will be more difficult to steer. Warnings and Safety Regulations TECHNICAL ITEMS OF SPECIAL IMPORTANCE The engine cooling system is thermostatically controlled. Running-in