owners manual BMW M4

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Seite 154 Driving tips BMW M4 technology BMW M4 technology Because of particular structural characteristics, Vehicle features and options there may be operation-related noises during This chapter describes all standard, country- braking. However, this has no effect on per‐ specific and optional features offered with the formance, operational reliability and reliability series. It also describes features that are not of the brake. necessarily available in your car, e. g., due to the selected options or country versions. This Correct braking also applies to safety-related functions and To keep the brake system in optimum condi‐ systems. The respectively applicable country tion, it is expedient to apply them at regular in‐ provisions must be observed when using the tervals corresponding to the vehicle character. respective features and systems. M carbon ceramic brake High-performance engine The high-performance braking system has The high-performance engine gets a maximum perforated carbon-ceramic brake disks and is power of 317 kW and maximum torque of designed for use on racetracks. 550 Nm from a displacement of 3 liters. With Due to properties of the materials used, brak‐ its spontaneous response behavior, a speed ing may be associated with louder function range of wide utility results. The maximum en‐ noises, particularly in wet conditions, just be‐ gine speed is 7,600 rpm and is electronically fore the vehicle comes to a stop. However, this controlled. Because of the high engine dynam‐ has no effect on the performance, operational ics, the maximum engine speed with the vehi‐ reliability and durability of the brake. cle stationary is reduced. The effects of moisture and road salt, from us‐ Warm-up ing a carwash or dew formation overnight e.g., may render the braking effect comparable to During the engine warm-up phase, the high- that of a conventional braking system. This performance engine has a somewhat rougher may be perceived as reduced braking effect running behavior because of the emission con‐ and can be compensated for if needed by trols. pressing the brake pedal harder. When the engine is cold, the exhaust system Before washing the vehicle in an automatic has a slightly metallic undertone due to the na‐ carwash or wash tunnel, clean the brake discs ture of the system. and brake calipers with a steam jet or high- For more information about the warm-up pro‐ pressure washer as well, to prevent encrusta‐ cedure: Engine speed, refer to page 80, and tions and dirt buildups, caused by salt crystals, engine oil temperature, refer to page 80. e.g., if the car is immobile afterwards. The cleaning effect of automatic carwashes or wash tunnels is usually not adequate for this in Compound brake the area around the wheels. The high-performance braking system has To do this, also follow the instructions in perforated compound brake discs. Washing the vehicle, refer to page 205, and Braking safely, refer to page 157. 154 Online Edition for Part no. 01 40 2 960 786 - II/15

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