Genuine Mercedes 1295000849 Engine Coolant Expansion Tank

The Genuine Mercedes 1295000849 Engine Coolant Expansion Tank is an OEM replacement reservoir designed to maintain proper coolant levels and pressure in your Mercedes-Benz cooling system. This expansion tank serves as the critical component that allows coolant to expand and contract as it heats up and cools down, while also providing a collection point for excess coolant.

Key Features:

• Genuine Mercedes-Benz OEM part for guaranteed fit and quality
• Updated design with screw-on type pressure cap (cap sold separately - part number 2105010315)
• Features additional outlet port that requires plugging on earlier chassis models
• Positioned as the highest point in the cooling system to allow trapped air to escape
• Prevents cooling system overpressure and maintains optimal engine temperature
• Direct replacement for earlier part number 1295000349 on chassis serial numbers from F-138418 and later

This expansion tank is engineered specifically for Mercedes-Benz R129 chassis vehicles including 300SL, 500SL, 600SL, SL320, SL500, and SL600 models. The reservoir is constructed from durable materials and subjected to rigorous Mercedes-Benz testing standards. Early signs of expansion tank failure include coolant residue around the cap area, steam from the tank, visible leaks, or elevated engine operating temperatures. When replacing this tank on earlier model vehicles, note that the additional outlet port must be plugged with an appropriate cap and hose clamp.