2022 Mercedes-Benz SL63 AMG Has A Coolant Leak

Diagnosing Coolant Leak Issues in Your 2022 Mercedes-Benz SL63 AMG and Effective Repair Strategies

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
50% chance it's the
Loose Hose Connections
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25% chance it's the
Radiator
0%
25% chance it's the
Water Pump
The most common reasons a 2022 Mercedes-Benz SL63 AMG has a coolant leak are loose hose connections, a broken radiator, or a failed water pump.
  • Loose Hose Connections: A loose hose connection can lead to vacuum leaks or fluid loss, resulting in poor engine performance or overheating.
  • Radiator: A damaged or clogged radiator can impede coolant flow, resulting in engine overheating and reduced cooling efficiency.
  • Water Pump: A failing water pump can lead to coolant leaks or overheating due to inadequate circulation of coolant in the engine.
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 SL63 AMG has a coolant 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.

A failing radiator can cause the engine to run hot or overheat. Most radiators are made of metal and plastic. The plastic parts can become brittle and crack over time, causing a leak of coolant (typically green or pink in color). All manufacturers have a recommended service interval for coolant renewal. As the coolant ages, the additives breakdown and being to form solid deposits. These deposits will build up in the passages of the cooling system and will eventually clog components, including the radiator. A leaking or clogged radiator must be replaced. Some automatic transmission cars will also have a transmission cooler integrated into the radiator. Lines going to and from the transmission circulate transmission fluid to help cool the transmission in heavy duty applications such as towing or off-roading. If this integrated cooler fails, it can allow transmission fluid and coolant to mix. This will causing shifting issues in addition to overheating.

A coolant leak may be noted from the hoses. Coolant hoses can be damaged by oil leaks, or age. This will lead to swelling or cracking, it is suggested to replace the hoses before they begin leaking to avoid potential overheating.

If a vehicle is overheating, a bad thermostat could be the problem, and a damaged thermostat housing is more likely to produce a coolant leak, either from a cracked or warped housing or a failed seal to the engine. The thermostat housing can be made of metal or plastic. And the housing can be a stand-alone part that is separate from the thermostat, or (on later model vehicles) can be integrated with the thermostat and replaced as a single unit.

The two most common signs of a bad pump are leaks and noises.

Leaking water pumps can result in damage to the drive and timing belts, and cause the engine to overheat. A failed water pump can be caused by other problems in the cooling system, such as a bad thermostat, radiator or head gasket.

What are the steps to diagnose a coolant leak in a 2022 Mercedes-Benz SL63 AMG?

To effectively diagnose a coolant leak in your 2022 Mercedes-Benz SL63 AMG, begin with a comprehensive visual inspection of the vehicle. Look for any signs of coolant pooling beneath the car or around essential components such as the radiator, hoses, and water pump. Noticing wet spots or discoloration can be a clear indicator of a leak. Following this, conduct a pressure test on the cooling system; this involves pressurizing the system and observing for any drops in pressure, which would suggest a leak. It's also crucial to regularly monitor your coolant levels; a consistent decrease can signal a leak that requires immediate attention. Pay special attention to the radiator and hoses for any signs of wear, such as cracks or bulges, which could be the source of the leak. Additionally, if you see white smoke emanating from the exhaust, this may indicate coolant leaking into the combustion chamber, potentially pointing to a more severe issue like a blown head gasket. If these diagnostic steps do not reveal the source of the leak or if the problem continues, consulting a qualified mechanic for a thorough inspection and repair is advisable. By following this structured diagnostic approach, you can systematically identify and address coolant leaks, ensuring the optimal performance and longevity of your vehicle's cooling system.

What are the common causes of a coolant leak in a 2022 Mercedes-Benz SL63 AMG?

When dealing with coolant leaks in a 2022 Mercedes-Benz SL63 AMG, it's essential to understand the common problems that may arise. A faulty radiator is often a primary culprit, as it can develop leaks over time due to corrosion or physical damage. Additionally, a damaged water pump can lead to significant coolant loss, as it is responsible for circulating coolant throughout the engine. Worn-out hoses are another frequent issue; these rubber components can deteriorate and crack, resulting in leaks. It's also crucial to check for a cracked engine block, which, while less common, can cause severe coolant loss and engine damage. Loose or damaged hose clamps may fail to secure hoses properly, leading to leaks at connection points. Lastly, a faulty coolant reservoir can also contribute to leaks, as it holds and regulates the coolant supply. By being aware of these potential issues, DIY enthusiasts can perform regular inspections and address any problems promptly, ensuring the longevity and performance of their vehicle.

How urgent is it to address a coolant leak in a 2022 Mercedes-Benz SL63 AMG?

Addressing a coolant leak in a 2022 Mercedes-Benz SL63 AMG is of utmost urgency due to the significant risks associated with engine overheating and potential damage. Coolant plays a vital role in maintaining optimal engine temperature; a leak can disrupt this balance, leading to overheating that may result in catastrophic engine failure. Ignoring the signs of a coolant leak not only jeopardizes the engine's integrity but can also diminish the vehicle's overall performance, affecting fuel efficiency and smooth operation. Moreover, the longer the leak persists, the more extensive and costly the repairs can become, as prolonged exposure can damage critical engine components. Therefore, for DIY enthusiasts, it is crucial to act swiftly upon noticing any signs of a coolant leak to safeguard the vehicle's performance and longevity, ensuring a safe and efficient driving experience.

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2022 Mercedes-Benz SL63 AMG Coolant Leak Causes & Repairs