2018 Mercedes-Benz AMG GT Has A Vacuum Leak

Diagnosing Vacuum Leaks in Your 2018 Mercedes-Benz AMG GT: Symptoms, Causes, and Repair Solutions

Find Repair Location
Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Leaking Vacuum Hoses
0%
30% chance it's the
Leaking Gaskets and Seals
0%
20% chance it's the
Bad Actuators and Valves
0%
10% chance it's
Something else
The most common reasons a 2018 Mercedes-Benz AMG GT has a vacuum leak are leaking vacuum hoses, leaking gaskets and seals, or bad actuators and valves.
  • Leaking Vacuum Hoses: A cracked or disconnected vacuum hose can lead to a loss of engine vacuum, resulting in poor engine performance and increased fuel consumption.
  • Leaking Gaskets and Seals: Aged or damaged gaskets and seals can lead to fluid leaks, resulting in loss of engine oil or coolant and potential engine damage.
  • Bad Actuators and Valves: A malfunctioning actuator or valve can disrupt the proper operation of the vehicle's systems, leading to issues such as poor engine performance or erratic behavior of components like the HVAC system.
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 2018 Mercedes-Benz AMG GT has a vacuum leak?

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.

Problems with the intake manifold gasket can create the following symptoms:

  • Illuminated check engine light
  • Erratic engine performance
  • Oil and coolant leaks
  • Poor gas mileage
  • Stalling

» LEARN MORE: Intake manifold gasket symptoms

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

What are the steps to diagnose a vacuum leak in a 2018 Mercedes-Benz AMG GT?

To effectively diagnose a vacuum leak in a 2018 Mercedes-Benz AMG GT, start with a thorough visual inspection of the engine bay. Look for any damaged or disconnected vacuum hoses, paying close attention to cracks, holes, or loose connections that could indicate a leak. Next, start the engine and listen for any hissing noises, as these sounds often signal escaping air from a vacuum leak. If you have access to a smoke machine, use it to introduce smoke into the vacuum system; this method is highly effective for pinpointing leaks as the smoke will escape from any compromised areas. Alternatively, you can spray soapy water on the vacuum hoses and connections while the engine is running; if there’s a leak, the escaping air will create bubbles in the soapy solution. Additionally, monitor the engine's performance for symptoms such as rough idling, stalling, or poor acceleration, which can all indicate a vacuum leak. Finally, utilize a diagnostic scanner to check for any error codes related to the vacuum system, as this can help you identify the specific location of the leak. By following this structured approach, you can efficiently diagnose and address any vacuum leak issues, ensuring your vehicle operates at its best.

What are the common causes of a vacuum leak in a 2018 Mercedes-Benz AMG GT?

When diagnosing vacuum leaks in a 2018 Mercedes-Benz AMG GT, it's essential to understand the common problems that can arise within the vehicle's vacuum system. One prevalent issue is the wear and tear of vacuum hoses, which can deteriorate over time due to exposure to heat and engine vibrations, leading to cracks or breaks that allow air to escape. Additionally, loose or improperly connected hoses can create gaps that disrupt the vacuum seal, resulting in performance issues. Another critical area to inspect is the intake manifold gasket; if this component is damaged or worn, it can fail to maintain the necessary vacuum pressure. Furthermore, the integrity of the intake manifold itself should be checked for any cracks or damage that could contribute to leaks. Lastly, a malfunctioning vacuum pump can also be a source of vacuum leaks, affecting the overall efficiency of the engine. By being aware of these common causes, DIY enthusiasts can effectively troubleshoot and address vacuum leaks, ensuring optimal engine performance and longevity. Regular inspections and maintenance are key to preventing these issues from escalating.

How urgent is it to address a vacuum leak in a 2018 Mercedes-Benz AMG GT?

Addressing a vacuum leak in your 2018 Mercedes-Benz AMG GT is not just a matter of routine maintenance; it is crucial for the vehicle's performance and longevity. Vacuum leaks can lead to significant issues such as rough idling, stalling, and decreased fuel efficiency, which can compromise your driving experience. Moreover, if left unaddressed, these leaks can cause further damage to the engine and other critical components, resulting in costly repairs down the line. The urgency of fixing a vacuum leak cannot be overstated, as neglecting it may not only affect the car's performance but also pose safety risks while driving. By taking prompt action, you ensure that your AMG GT operates smoothly and efficiently, safeguarding both your investment and your safety on the road.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.