Wagner Tuning Mercedes Benz (CL)A45 AMG Front Mounted Radiator

Wagner Tuning Front Mounted Radiator – Mercedes-Benz (CL)A45 AMG

The Mercedes-Benz A45, CLA45 and GLA45 AMG all share the M133 2.0-litre turbocharged engine, which uses an indirect charge air cooling system. In simple terms, the engine relies on its own separate cooling water circuit to lower the temperature of the charged air before it enters the combustion chamber. The colder this water stays, the better the engine performs, particularly during sustained or repeated hard driving.

The standard factory radiator copes well enough with everyday driving, but when pushed on track, during spirited road use, or in warmer climates, coolant temperatures rise quickly and performance begins to drop off. This Wagner Tuning front mounted radiator is engineered specifically to tackle that problem.

What makes this radiator different?

Wagner Tuning have redesigned the core using what they call a competition racing mesh. This refers to the internal lattice structure inside the radiator responsible for transferring heat from the coolant into the air passing through it. The result is a radiator that holds noticeably more coolant and dissipates heat more effectively than the original.

The greater coolant volume means the system takes longer to reach high temperatures and recovers more quickly between hard runs. This helps maintain consistent power output rather than letting performance fade as temperatures climb. Importantly, the core has been designed to allow sufficient airflow to reach the main engine water cooler sitting behind it, so general engine cooling is not compromised.

Each unit is finished with a thermally conductive anti-corrosion coating, helping to preserve long-term cooling performance and protect against corrosion.

OEM vs Wagner Tuning – core dimensions compared

The Wagner Tuning radiator has a slightly smaller overall footprint but is double the thickness of the original. This extra depth is where the significant increase in coolant volume comes from – up by roughly 79% over the standard unit. The optimised internal mesh more than compensates for the reduced face area, maintaining strong heat transfer.

Key benefits

• Approximately 79% greater coolant capacity for more stable temperatures
• Competition racing mesh core for efficient heat transfer
• Anti-corrosion coating for long-term durability
• Maintains airflow to the main engine water cooler behind it
• Direct replacement using factory mounting points and connections

Installation

This radiator is designed as a direct replacement for the factory unit and installs using the original mounting points and connections. Wagner Tuning describe the fitting process as close to plug and play, making it a sensible upgrade for owners looking to improve cooling without modifying the surrounding hardware.

Fitment

Designed for the Mercedes-Benz A45, CLA45 and GLA45 AMG models fitted with the M133 2.0-litre turbocharged engine. Please use our vehicle lookup tool or check the Vehicle Fitment tab to confirm compatibility with your specific model and year before purchasing.