Nissens 707209 HVAC Heater Core

Nissens 707209 Heater Core for Mercedes-Benz

The Nissens 707209 HVAC heater core is built for Mercedes-Benz applications that require precise cabin heat transfer and dependable thermal performance. With an aluminum core, aluminum tanks, and brazed cooling fins, it is engineered for efficient heat exchange in the vehicle’s HVAC system.

Compatible with select Mercedes-Benz AMG GT, C-Class, E-Class, GLC, CLS, and G models, this heater core is a direct-fit replacement for many 2015-2022 applications. If you are replacing a leaking or restricted Mercedes-Benz heater core, part number 707209 is a fitment-focused option for restoring interior heat output.

Key Features

• Aluminum core material for efficient heat transfer
• Aluminum tank construction for HVAC durability
• Brazed cooling fins for consistent thermal performance
• Core dimensions: 5.2800 in. height, 9.6500 in. length, 1.0200 in. width
• Pipe included: No
• Cross-reference part numbers: 0998300061, A0998300061

Detailed Description

Nissens develops thermal management components with a focus on OE-style fit and material quality, and the 707209 heater core follows that approach with an aluminum-to-aluminum construction and brazed fin design. This helps support efficient heat transfer through the HVAC system while maintaining the dimensional accuracy needed for Mercedes-Benz cabin heating service work. The part number 707209 is listed for a wide range of Mercedes-Benz models, including AMG GT 43, AMG GT 53, C300, E350, GLC300, and CLS450 applications.

For buyers searching Mercedes-Benz heater core replacement, HVAC heater core for Mercedes-Benz C300, or Nissens 707209 for E-Class and GLC models, this unit provides a direct replacement path for vehicles that match the listed dimensions and fitment data.

What It Helps Fix

• Weak or uneven cabin heat
• Coolant odor inside the vehicle from a leaking heater core
• Restricted coolant flow through the HVAC heat exchanger
• Fogging or defrost performance issues tied to poor heater output
• Temperature inconsistency in the passenger compartment

Installation Notes and Tips

Verify the vehicle’s heater core dimensions and OE reference before installation, especially on Mercedes-Benz models with the listed 134x245x26 dimensions. Inspect the HVAC housing, coolant lines, and seals during replacement, and confirm the system is properly bled after installation. This part does not include pipes.

• Fits 2021-2022 Mercedes-Benz AMG GT 43, N/A
• Fits 2022 Mercedes-Benz AMG GT 53, N/A; Notes: Dims.: 134x245x26
• Fits 2022 Mercedes-Benz C300, N/A; Notes: Dims.: 134x245x26
• Fits 2019-2022 Mercedes-Benz CLS450, N/A
• Fits 2022 Mercedes-Benz E350, N/A; Notes: Dims.: 134x245x26
• Fits 2022 Mercedes-Benz E450, N/A; Notes: Dims.: 134x245x26
• Fits 2022 Mercedes-Benz E53 AMG, N/A; Notes: Dims.: 134x245x26
• Fits 2022 Mercedes-Benz GLC300, N/A; Notes: Dims.: 134x245x26
• Fits 2022 Mercedes-Benz GLC43 AMG, N/A; Notes: Dims.: 134x245x26
• Fits 2019-2021 Mercedes-Benz AMG GT 53, N/A
• Fits 2019-2021 Mercedes-Benz AMG GT 63, N/A
• Fits 2019-2021 Mercedes-Benz AMG GT 63 S, N/A
• Fits 2016-2021 Mercedes-Benz C300, N/A
• Fits 2017-2021 Mercedes-Benz C43 AMG, N/A
• Fits 2016-2021 Mercedes-Benz C63 AMG, N/A
• Fits 2015-2021 Mercedes-Benz C63 AMG S, N/A
• Fits 2019-2021 Mercedes-Benz CLS53 AMG, N/A
• Fits 2020-2021 Mercedes-Benz E350, N/A
• Fits 2019-2021 Mercedes-Benz E450, N/A
• Fits 2019-2021 Mercedes-Benz E53 AMG, N/A
• Fits 2018-2021 Mercedes-Benz E63 AMG S, N/A
• Fits 2019-2021 Mercedes-Benz G550, N/A
• Fits 2019-2021 Mercedes-Benz G63 AMG, N/A
• Fits 2016-2021 Mercedes-Benz GLC300, N/A
• Fits 2017-2021 Mercedes-Benz GLC43 AMG, N/A
• Fits 2018-2021 Mercedes-Benz GLC63 AMG, N/A
• Fits 2018-2021 Mercedes-Benz GLC63 AMG S, N/A
• Fits 2018-2020 Mercedes-Benz GLC350e, N/A
• Fits 2017-2019 Mercedes-Benz E300, N/A
• Fits 2016-2018 Mercedes-Benz C350e, N/A
• Fits 2018 Mercedes-Benz E400, N/A
• Fits 2017-2018 Mercedes-Benz E43 AMG, N/A
• Fits 2016 Mercedes-Benz C450 AMG, N/A
• Fits 2015 Mercedes-Benz C400, N/A

Quality Assurance

Nissens is a market-focused thermal systems manufacturer that develops and produces HVAC and engine efficiency components to consistent quality standards. The 707209 heater core reflects that product approach with aluminum construction and application-specific fitment for Mercedes-Benz service replacement.