What is the reason for feeling vibrations inside a Mercedes-Benz car?

[LaLucy]

The reason for feeling vibrations inside a Mercedes-Benz car is due to the aging of the engine mounts. The engine and the car body are connected through engine mounts, which act as elastic components. After prolonged use, these mounts can age, causing the engine's vibrations to be transmitted into the cabin. Taking the Mercedes-Benz S-Class 2021 S400L Business model as an example: this car is manufactured by Mercedes-Benz (imported), classified as a full-size car, and equipped with a 9-speed automatic transmission. The car's dimensions are 5290mm in length, 1921mm in width, and 1503mm in height, with a wheelbase of 3216mm. The intake form is twin-turbocharged.

[StMiguel]

I've been driving a Mercedes-Benz for many years and often notice noticeable body vibrations at idle or low speeds. This is usually caused by a malfunctioning cylinder in the engine. For example, spark plugs may be aged with severe carbon buildup, reducing ignition efficiency; or the ignition coil might be faulty, causing unstable current. Spark plugs have a limited lifespan and should generally be inspected and replaced every 20,000 kilometers. Clogged fuel injectors can also lead to uneven fuel supply, affecting combustion smoothness. Aging engine mounts are a common issue—when rubber components wear out, their damping effect weakens, allowing vibrations to transfer more easily into the cabin. If a mount breaks, the shaking becomes more intense. During routine maintenance, have technicians check these areas. Don’t ignore vibration signals, as they may indicate internal engine problems like piston ring wear. Addressing issues early can prevent major failures and ensure driving safety.

[LeDante]

As a Mercedes-Benz owner, I pay special attention to body vibrations at high speeds, which are most likely caused by tire or wheel issues. The most common culprit is tire imbalance, while slight wheel deformation or uneven tire wear can also lead to unstable rotation. Incorrect wheel alignment further exacerbates the problem by causing misaligned wheel trajectories. Last time, after installing new tires without balancing, the steering wheel shook violently on the highway. Both overinflated and underinflated tires can cause vibrations, and Mercedes-Benz has precise tire pressure requirements. I recommend checking tire conditions every six months or 10,000 kilometers, performing balancing and alignment when necessary. Wheel deformation is rare but can occur after impacts. Maintaining tire health is key to preventing vibrations and enhancing comfort.

[LauraMarie]

I experienced body shaking while driving my Mercedes, mostly at low speeds on uneven roads. The cause is often related to the suspension system. Leaking or aging shock absorbers reduce damping effectiveness, allowing road vibrations to directly transmit into the cabin. Damaged rubber bushings on control arms can destabilize wheel alignment, intensifying driving wobbles. Worn tie rods or ball joints also contribute to increased shaking during driving. The inspection method is simple: if you feel pronounced bumps when going over small potholes, it's likely due to failed suspension components. Regularly replacing shock absorbers and rubber parts helps prevent minor issues from escalating into major problems.