Mercedes C-Class W203 Expansion Tank | Coolant Bottle 2000–2007

Key Features (Bullet Points)

• Wide Compatibility – Suitable for Mercedes-Benz C-Class W203 (2000–2007), including Saloon, Coupe (CL203), and Estate (S203) models
• Cooling System Support – Maintains proper coolant expansion and reservoir function for efficient engine temperature control
• Cost-Effective Replacement – Economical aftermarket solution without compromising essential performance
• Durable Construction – Manufactured from quality materials for long-lasting reliability
• Direct Replacement Fit – Designed for easy installation using existing components

Product Description

This coolant expansion tank, also known as a radiator overflow bottle or water reservoir, is designed for Mercedes-Benz C-Class W203 models (2000–2007), including Saloon, Coupe (CL203), and Estate (S203) variants.

Compatible with a range of petrol and diesel engines—including the C220 CDI (OM646)—this expansion tank plays a vital role in the cooling system by allowing coolant to expand and contract, helping maintain proper pressure and engine temperature.

Manufactured as an economical aftermarket replacement, it offers reliable performance and accurate fitment across multiple W203 applications. Its durable construction ensures long service life, making it ideal for maintenance or replacement needs.

Please note that this unit does not include a radiator cap. It is designed to be used with your existing cap, although replacing the cap during installation is recommended for optimal system performance.

Specifications

• Product Type: Coolant Expansion Tank / Radiator Bottle
• Vehicle Compatibility: Mercedes-Benz C-Class W203 (2000–2007)
• Body Types: Saloon / Coupe (CL203) / Estate (S203)
• Cap Included: No
• Condition: New

What’s in the Box

• 1 × Expansion Tank

Disclaimer

Please verify compatibility with your vehicle’s make, model, engine type, and production year before purchasing. This product does not include a radiator cap and requires reuse of the existing cap or a compatible replacement. Professional installation is recommended. The manufacturer and seller are not responsible for any damage or issues resulting from improper installation, misuse, or incorrect fitment.