Intercooler for Mercedes Benz S-Class S65 AMG (2018-2020) 6.0L

Direct-Fit All-Aluminum Intercooler for 2018-2020 Mercedes Benz S-Class (W222)

What it Does: The Performance Charge-Air Intercooler replaces the leak-prone factory auxiliary heat exchanger on the 2018-2020 S-Class to stabilize intake air temperatures and prevent thermal throttling under high boost pressure.

The Stock Mercedes Benz S-Class Heat Soak and End-Tank Vulnerability

The twin-turbocharged M279 V12 engine produces immense thermal load within the engine bay, subjecting the factory charge-air cooling system to severe heat cycles. Factory units equipped with crimped plastic end tanks and thin core headers repeatedly fail at the resin joints over time. This structural degradation leads to micro-cracks, coolant loss from the low-temperature circuit, and sudden loss of charge-air cooling efficiency, prompting the ECU to pull ignition timing and reduce boost output.

The Engineering Solution

Engineered as a heavy-duty cooling upgrade, this direct-fit heat exchanger utilizes an all-aluminum 1-row crossflow core paired with fully TIG-welded aluminum end tanks. By eliminating crimped plastic seams, it guarantees structural integrity under high pressure and rapid thermal expansion. The high-efficiency louvered aluminum tube-and-fin core enhances ambient thermal transfer, actively rejecting heat from the water-to-air circuit to deliver lower manifold air temperatures, eliminate heat soak, and restore factory boost response.

What's Included

• 1 x All-aluminum direct-fit charge-air intercooler
• Coolant cap (included when supplied with unit)

Technical Specifications

Compatibility

• 2018-2020 Mercedes Benz S-Class S65 AMG 6.0L V12

Frequently Asked Questions & Fitment Warnings

Does this fit the W222 S-Class?

Yes, this is a direct fit for the 2018-2020 Mercedes Benz S-Class equipped with the M279 6.0L V12 engine. This unit does not fit 3.0L or 4.0L S-Class models, and it is built strictly without integrated engine oil or transmission oil cooling circuits.

Do I need to vacuum-bleed the charge cooling circuit after installation?

Yes, professional vacuum filling and bleeding of the low-temperature intercooler circuit is required to prevent trapped air pockets that cause elevated IATs and potential water pump cavitation.

The Mercedes Benz Precision Standard

Manufactured to rigid European performance tolerances, this all-aluminum intercooler guarantees factory-level mounting clearance and hose engagement, preserving ECU calibration integrity without triggering diagnostic trouble codes or check engine lights.