2022 Mercedes-Benz Sprinter 1500 Has Rough Idle

Resolve Rough Idle in 2022 Mercedes-Benz Sprinter 1500

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
21% chance it's the
Spark Plugs
0%
15% chance it's the
Ignition Coil
0%
64% chance it's
Something else
The most common reasons a 2022 Mercedes-Benz Sprinter 1500 has rough idle are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
  • Spark Plugs: Worn or fouled spark plugs can lead to misfires, poor fuel economy, and difficulty starting the engine.
  • Ignition Coil: A faulty ignition coil can cause misfires, rough idling, and difficulty starting the engine due to inadequate spark delivery to the spark plugs.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2022 Mercedes-Benz Sprinter 1500 has rough idle?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Brake caliper failure occurs in two different ways, and they create different symptoms.

The caliper can become stuck, in which case it won't release the brake pads. The seized caliper will cause the vehicle to brake constantly on one side, forcing the car to move toward that side. This pulling will be accompanied by a strong odor from one wheel.

Another way calipers fail is by leaking. If the caliper leaks, the brake pedal will feel too easy to push, and will sink all the way to the floor when held. Braking will become less effective the longer this goes on. There may also be brake fluid leaking onto the wheel.

Here are a few common symptoms of worn-out brake pads:

  1. Low brake pad warning light is on: Not all vehicles are equipped with this system, but if yours is, this dashboard indicator light will likely be the first signal it’s time to replace your brake pads.
  2. Brakes start to squeal regularly: This is often one of the first signs of worn brake pads and is caused by a metallic piece built into brake pads for this exact purpose. This part contacts the brake rotor to make a squealing or whining noise when the pads are low.
  3. Brakes make loud grinding noise: If not addressed early enough, your brake pads may get so worn that the metal backing plate of the pad grinds against the metal rotor.
  4. Brake pads look thin: You may be able to visually check your brake pad thickness to determine if they need replacement.

Brake rotors are mainly maintenance free, but when they have been subjected to abnormally hard use, the heat they absorb can cause the metal to turn blue, and cracking to occur. When this occurs, customers often specify they have lost braking power, or the vehicle's brakes are making noise. There may be no symptoms at all related to changing the brake rotors, since it is recommended to change brake rotors on most modern vehicles when performing a standard brake service.

Most often, a brake system inspection will just be a routine portion of manufacturer specified maintenance, and will be performed at mileage intervals. In those cases, there will likely be no symptoms. However, when a brake system makes a funny noise, causes vibration, is hard to use, will not slow the vehicle, prevents the vehicle from driving, makes the vehicle pull to one side, or leaks brake fluid, the vehicle will need a visit dedicated to the inspection of the brake system.

What are the initial diagnostic steps to take for a rough idle in a 2022 Mercedes-Benz Sprinter 1500?

When addressing a rough idle in your 2022 Mercedes-Benz Sprinter 1500, it's essential to adopt a methodical diagnostic approach. Start by checking for error codes using a diagnostic scanner, as these codes can reveal specific issues affecting engine performance. Next, inspect the spark plugs; worn or fouled plugs are common culprits of rough idling and can be easily replaced if necessary. Following this, examine the air filter for clogs or dirt, as a clean air filter is crucial for optimal airflow to the engine. Additionally, assess the fuel system, including the fuel filter and injectors, since any disruptions in fuel delivery can significantly impact idle quality. Don’t overlook the vacuum hoses; inspect them for leaks or damage, as these can alter the air-fuel mixture and lead to rough idling. Finally, check the throttle body for any carbon buildup or dirt that may hinder its function. By systematically following these steps, you can effectively diagnose and address the rough idle issue, ensuring your Sprinter runs smoothly.

What are the common problems that could cause a rough idle in a 2022 Mercedes-Benz Sprinter 1500?

When dealing with a rough idle in your 2022 Mercedes-Benz Sprinter 1500, it's essential to consider several common problems that could be affecting your vehicle's performance. One of the first areas to check is the air filter; a dirty or clogged air filter can significantly restrict airflow to the engine, resulting in an uneven idle. Additionally, a faulty oxygen sensor may disrupt the air-fuel mixture, leading to similar symptoms. It's also wise to inspect for any vacuum leaks in the intake system, as these can create an improper air-fuel balance. Worn or faulty spark plugs are another frequent culprit, as they can cause engine misfires that manifest as rough idling. Furthermore, issues within the fuel system, such as a clogged fuel filter or a failing fuel pump, can hinder engine performance. Lastly, don't overlook the ignition system; problems with components like the ignition coil or distributor can also contribute to a rough idle. By systematically checking these areas, you can effectively diagnose and address the underlying issues affecting your Sprinter's idle quality.

How urgent is it to address the rough idle in a 2022 Mercedes-Benz Sprinter 1500?

Addressing a rough idle in your 2022 Mercedes-Benz Sprinter 1500 should be a priority for any DIY enthusiast, as neglecting this issue can lead to more severe engine problems and costly repairs. A rough idle often signals underlying issues within the engine or fuel system, which, if left unaddressed, can escalate into significant damage over time. This not only affects your vehicle's performance but can also decrease fuel efficiency, leading to higher operating costs. Moreover, regular maintenance and timely repairs are essential for the longevity of your vehicle, ensuring that it runs smoothly and efficiently. While it may not seem like an immediate emergency, taking the time to diagnose and resolve a rough idle can save you from more extensive repairs in the future, making it a wise investment in your vehicle's health.

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