Intercooler for Mercedes Benz S-Class S560 S63 AMG (2020-2021) 4.0L

Heavy-Duty All-Aluminum Intercooler for 2020-2021 Mercedes Benz S-Class (W222)

What it Does: The direct-fit all-aluminum intercooler replaces the auxiliary low-temperature heat exchanger on the 2020-2021 S-Class to stabilize intake air temperatures and prevent boost-induced heat soak.

The Stock Mercedes Benz S-Class Heat Soak Vulnerability

The hot-inside-V configuration of the twin-turbocharged M176 and M177 engines generates extreme thermal loads within the tight engine bay of the W222 chassis. Factory auxiliary heat exchangers with crimped plastic end tanks and light-gauge brazing are susceptible to microscopic core fatigue, thermal saturation, and seam degradation over repetitive heat cycles. When the charge-air coolant circuit heat-soaks, elevated intake manifold temperatures trigger the Bosch ECU to pull ignition timing, resulting in sluggish throttle response and a measurable loss in peak output under sustained boost.

The Engineering Solution

Engineered as a direct replacement upgrade, this high-efficiency unit utilizes a 1-row crossflow all-aluminum tube-and-fin core paired with TIG-welded aluminum end tanks, eliminating the catastrophic failure points of mechanical O-ring crimps. The optimized fin density enhances surface-area heat dissipation across the secondary charge-air cooling loop without restricting cooling airflow to downstream heat exchangers. Retaining direct-fit hose connections and mounting points, it installs seamlessly into the factory auxiliary location, maintaining consistent water-to-air cooling efficiency even under high-boost operating conditions.

What's Included

• 1 x All-aluminum auxiliary intercooler assembly
• 1 x Radiator cap (included when supplied with unit)

Technical Specifications

Compatibility

• 2020-2021 Mercedes Benz S-Class S560 4.0L (auxiliary / center location per application)
• 2020-2021 Mercedes Benz S-Class S63 AMG 4.0L (auxiliary / center location per application)

Frequently Asked Questions & Fitment Warnings

Does this fit the W222 S-Class?

Yes, this is a direct fit for the 2020-2021 Mercedes Benz S-Class equipped with the M176 or M177 4.0L Bi-Turbo engine. This unit does not fit 2018-2019 3.0L or 4.0L models, nor does it accommodate configurations requiring integrated engine oil or transmission oil coolers.

Do I need to bleed the intercooler circuit after installation?

Yes, the closed-loop low-temperature charge-air cooling system must be vacuum-filled and thoroughly bled of all trapped air to maintain full heat transfer efficiency.

The Mercedes Benz Precision Standard

Engineered to meet the tight manufacturing tolerances demanded by German high-performance luxury sedans, this all-aluminum charge-air cooler maintains factory coolant flow rates and sensor thresholds to prevent diagnostic trouble codes while restoring thermal stability under heavy engine load.