YzusGomumu Coolant Reservoir Tank with Cap for Mercedes‑Benz — Sensor-Ready OE Fit (GL/ML/AMG 2006–2015)

YzusGomumu Engine Coolant Reservoir Tank with Cap is a direct-replacement overflow bottle designed to restore proper coolant storage and sensor monitoring on compatible Mercedes‑Benz models.

If your Mercedes is showing low coolant warnings, visible leaks, or an intermittent temperature alert, a worn or cracked coolant reservoir can be the cause. This replacement overflow tank is molded from corrosion-resistant material, includes a cap, and accepts the factory sensor so you can re-establish coolant containment, level monitoring, and dependable performance in the cooling circuit.

Which Mercedes models will this reservoir tank fit?

This reservoir is made to match original-equipment fitment for a range of GL, ML and select AMG models from the mid‑2000s through early 2010s. Check the OE numbers and your vehicle year/model to confirm compatibility before ordering.

• Compatible models include: GL320 (2007–2009), GL350 (2010–2012), GL450/GL500/GL550 (2007–2012 ranges)
• ML series fits ML320/ML350/ML450/ML500/ML550/ML63 AMG (2006–2011 variants)
• Also fits SLS AMG models from 2011–2015 when matching OE 1645000049 and listed part numbers
• Always verify against OE references 1645000049, 603-256, 603256 before purchase

How does the sensor-ready design improve cooling system safety?

The tank accepts the factory coolant level/temperature sensor so the vehicle’s warning systems remain functional. When the sensor detects abnormal temperature or low fluid, the car’s dash can alert you, helping prevent overheating incidents.

• Built-in sensor accommodation for real‑time coolant level and temperature monitoring
• Allows existing wiring and dash alerts to work without splicing or adapters
• Helps the driver respond early to low fluid or high-temperature conditions

What materials and construction make this a durable replacement?

This overflow reservoir is produced from high‑grade, heat-resistant plastic engineered for the engine bay environment. Its corrosion- and impact-resistant construction reduces the chance of cracks, swelling, or leaks compared with aged factory tanks.

• Rugged thermoplastic resists engine-heat cycles and coolant chemicals
• Molded mounting points and inlet/outlet bosses match OE locations for secure installation
• Includes a sealed cap compatible with vehicle pressure specifications

How straightforward is installation and what should I check during fitment?

Installation is a typical bolt‑on replacement that most DIYers can complete with basic hand tools in under an hour. Make sure hoses and the sensor are properly seated and that you refill and bleed the cooling system per manufacturer recommendations.

• Remove the old tank, transfer sensor and hoses, then secure the new tank in factory mounts
• Inspect hose clamps and replace if brittle or corroded to ensure leak‑free connections
• Refill with the correct coolant type and cycle the engine to expel trapped air

Who is this for: Drivers and technicians maintaining Mercedes‑Benz GL, ML and select AMG vehicles who need an OE‑style coolant overflow reservoir that restores proper fluid containment and sensor functionality. It’s aimed at owners seeking an affordable, long‑lasting replacement part to prevent coolant loss, restore accurate level monitoring, and keep the engine operating within intended temperature ranges. Always confirm your vehicle’s year, model, and OE part numbers before ordering to ensure a direct fit.