Denso 221-9615 Radiator

Denso Radiator for Mercedes-Benz Cooling Systems

This Denso radiator, part number 221-9615, is built for Mercedes-Benz applications that require OE-style cooling performance and precise fitment. It is a direct replacement radiator for select GLC, E-Class, and S-Class models, including Mercedes-Benz GLC43 AMG and S550 applications.

Key Features

• Core height: 19.6250 in.
• Core width: 25.1875 in.
• Core thickness: 1.0625 in.
• Inlet diameter: 1.5000 in.
• Outlet diameter: 1.5000 in.
• No transmission oil cooler included
• OE-focused radiator configuration for fitment accuracy

Product Details

Denso part number 221-9615 is engineered to match OE radiator dimensions, tank design, fin pitch, core size, and material standards used by vehicle manufacturers. As a radiator, it supports stable engine temperature control by transferring heat away from the cooling system, which is critical for consistent operation in Mercedes-Benz GLC43 AMG, E43 AMG, Maybach S550, Maybach S600, S550, S600, S63 AMG, S65 AMG, and GLC300 models. Denso’s OE supply experience is reflected in the fitment-focused construction and durability testing used on this radiator.

This part cross-references Mercedes-Benz 0995003303 and Spectra Premium CU13027 for the same application.

What This Radiator Helps Address

• Engine overheating caused by reduced coolant heat transfer
• Coolant temperature instability during stop-and-go driving
• Radiator leakage from age, corrosion, or impact damage
• Restricted cooling performance from a worn or damaged core
• Fitment issues when replacing an OE Mercedes-Benz radiator

Installation Notes and Tips

• Verify inlet and outlet hose sizes before installation: 1.5000 in. each.
• Confirm the vehicle does not require a transmission oil cooler in the radiator assembly.
• Inspect hoses, clamps, and coolant condition during replacement.
• Bleed the cooling system carefully after installation to remove trapped air.
• Use the vehicle’s service procedure for coolant refill and pressure testing.

Quality Assurance

Denso radiators are built to OE standards and undergo durability and function testing before release. That manufacturing approach supports reliable cooling performance and consistent fitment for Mercedes-Benz radiator replacement needs.