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If you drive with the clutch pedal pressed down or cruise in neutral instead of in gear, this is defined as coasting. While it is normal to drive like this over a short period, such as during gear changes or if slowing a vehicle, coasting over an extended period of time is inadvisable. Some drivers think coasting can save on fuel costs but the truth of the matter is that this is a highly dangerous habit.
The Mercedes specialists at our popular independent garage in Surrey strongly advise against coasting because of the health of your car.
The also recommend against it for your personal safety.
This blog post discusses the subject of coasting, takes a close look at its impact and establishes how dangerous it can be. Naturally, we want all motorists to be safe on the road but the welfare of local Mercedes drivers matters to us because we are Mercedes specialists.
For services at our workshop in Surrey, please call us today.
Some drivers avoid coasting because they believe it causes damage to a vehicle and leads to expensive repairs. In truth, coasting doesn’t directly damage a car’s internal mechanics. However, for most manual vehicles, including the Mercedes range, it can put extra strain on one specific clutch component, which is called a throw-out bearing.
This bearing disconnects the engine when a clutch pedal is pressed.
When you coast, the throw-out bearing is under continuous pressure for longer periods than necessary. Though it is a small component, using our Mercedes specialists to repair or replace damaged throw-out bearings can be time-consuming and costly because it involves the technician dismantling the entirety of the clutch system.
This leads to added costs for motorists from Surrey.
The part of your car that suffers most from coasting is actually the braking system. When you coast, your engine can no longer provide natural braking assistance, meaning your brake pads and discs take on extra work. As a result, coasting increases wear and tear, and it also reduces their overall lifespan. Drivers actually travel faster if coasting, putting more stress on the brakes to slow down safely.
If you notice unusual wear on your clutch or braking system, it may be wise to visit our trusted Mercedes specialists in Surrey, who can inspect and repair the issue before it becomes something serious.
Many motorists believe that coasting helps save fuel. While this may have been true for older vehicles, modern Mercedes engines operate differently. When coasting, your car will still use a small amount of fuel to keep the engine running. This is known as idling.
However, when the car remains in gear and you take your foot off the accelerator, fuel injection systems detect no power being demanded.
The system then cuts fuel supply to the injectors, allowing your car to move using momentum alone. Because the wheels remain connected to the engine, they keep it turning without needing additional fuel. In other words, if travelling downhill or driving without accelerating, keeping a car in gear saves more fuel than coasting in neutral.
If your fuel economy seems lower than expected, call an experienced Mercedes specialist in Surrey. Star-Tec can diagnose whether other mechanical or subsystem issues might be affecting the performance.
Despite the fuel-saving myths, coasting is not recommended because it reduces your control over the vehicle and increases the risk of accidents. Without engine engagement, braking distances are longer, and your ability to respond quickly to emergencies is compromised.
The Highway Code defines coasting as travelling in neutral, or with the clutch pressed down. It warns that coasting:
While coasting isn’t illegal, it is considered poor driving practice and could cause you to fail a driving test if done excessively. It is a habit best avoided for your safety, and your car’s longevity.
For professional advice on maintaining your vehicle, and preventing damage from habits like coasting, please contact your local Mercedes specialists in Surrey. We have a team of experienced technicians who understand how to always keep your vehicle performing at its best.