What is the normal tire pressure for Mercedes-Benz R320?
2 Answers
The tire pressure for Mercedes-Benz R320 is 2.3-2.5 bar. Strictly speaking, tire pressure refers to the air pressure inside the tire. Hazards of excessive tire pressure: The friction and adhesion of the tire will decrease, affecting braking performance; it can cause steering wheel vibration and deviation, reducing driving comfort; it accelerates the wear of the central tread pattern, shortening the tire's lifespan; the vehicle's vibration increases, indirectly affecting the lifespan of other components. The resistance to punctures decreases. When encountering sharp objects like nails or glass on the road, they can easily penetrate the tire, causing internal cracks or bursts, leading to a blowout. Hazards of insufficient tire pressure: The friction coefficient with the road surface increases, leading to higher fuel consumption; it makes the steering wheel heavy and prone to deviation, which are factors detrimental to driving safety; it increases the movement of various parts of the tire, causing excessive rolling and abnormal heating; it reduces the function of the cords and rubber, leading to delamination or cord breakage, and excessive friction with the rim, causing damage to the bead area and abnormal wear.
I've worked on many Mercedes-Benz cars, and the standard tire pressure for the R320 is usually around 2.2 to 2.5 bar. You should check the sticker on the door frame or the user manual for the exact value, as there might be slight variations depending on the model year. The most accurate measurement is when the car is cold, meaning you should check it after the car has been parked for three hours. In summer, don't exceed 2.5 bar, as overheating the tires can increase the risk of a blowout. In winter, you can slightly increase it by 0.2 bar, as low temperatures naturally cause tire pressure to drop. If you frequently carry a full load, you can add an extra 0.1 bar to the rear tires. The spare tire pressure is recommended to be kept above 2.8 bar, as it's meant for emergencies. Check the tire pressure with a gauge once a month—it's good for both tire lifespan and fuel efficiency. Always double-check before hitting the highway.
