Radiator for Mercedes Benz C-Class C230 C240 C280 C32 AMG C320 C350 C55 AMG (2001-2009)

High-Efficiency All-Aluminum 3-Row Performance Radiator for 2001-2009 Mercedes Benz C-Class (W203 / CL203)

What it Does: The all-aluminum 3-row performance radiator replaces the failure-prone factory heat exchanger on 2001-2009 Mercedes Benz C-Class models to eliminate coolant leaks, prevent thermal degradation, and optimize heat rejection under demanding driving conditions.

The Stock Mercedes Benz C-Class Cooling Weakness

Factory radiators in the W203 platform utilize aluminum tube cores mechanically crimped to glass-reinforced PA66 composite end tanks. Over repeated thermal cycles, cyclic expansion and contraction weaken the vulcanized rubber gaskets sealing these tanks. This leads to hairline fissures in the plastic inlet and outlet necks, severe stress fractures, and sudden pressure loss. Furthermore, the single-row OEM core restricts fluid transit volume, resulting in progressive heat soak and elevated operating temperatures when the M112, M271, or AMG powerplants are driven aggressively.

The Engineering Solution

Engineered to resolve structural fatigue, this direct replacement features a high-density, brazed 3-row aluminum core combined with 100% TIG-welded aluminum end tanks. Eliminating composite materials and crimped seals completely removes the primary failure point of the stock system. The enlarged core profile optimizes fluid capacity while louvered aluminum cooling fins maximize surface heat dissipation across incoming ambient airflow. Built to mate directly with factory chassis brackets, this assembly provides uncompromising burst pressure resistance and consistent thermal efficiency for daily and high-load use.

What's Included

• 1 x All-aluminum 3-row performance radiator
• Protective shipping caps on fluid ports

Technical Specifications

Compatibility

• 2001-2005 Mercedes Benz C240 (2.6L V6)
• 2001-2005 Mercedes Benz C320 (3.2L V6)
• 2002-2004 Mercedes Benz C32 AMG (3.2L Supercharged V6)
• 2002-2005 Mercedes Benz C230 (1.8L / 2.3L Supercharged I4)
• 2005-2006 Mercedes Benz C55 AMG (5.5L V8)
• 2006-2007 Mercedes Benz C230 (2.5L V6)
• 2006-2007 Mercedes Benz C280 (3.0L V6)
• 2006-2007 Mercedes Benz C350 (3.5L V6)
• 2001-2009 Mercedes Benz C-Class SportCoupe / CL203 (1.8L, 2.3L, 2.5L)

Frequently Asked Questions & Fitment Warnings

Does this fit the W203 C-Class?

Yes, this is a direct fit for 2001-2009 Mercedes Benz C-Class models equipped with 1.8L, 2.3L, 2.5L, 2.6L, 3.0L, 3.2L, 3.5L, and 5.5L engines conforming to the CU2337 core configuration. Always verify your specific transmission cooler line configuration prior to installation.

Do I need to bleed the cooling system after installation?

Yes, a thorough cooling system flush and proper vacuum-fill bleeding procedure are required to eliminate air pockets and prevent hot spots in European alloy blocks.

The Mercedes Benz Precision Caliber

European thermal management requires exact tolerances and uncompromising material standards to ensure engine electronics, thermostat thresholds, and auxiliary systems operate without triggering check-engine lights or overheating faults.