Vaico V30-8406 Engine Coolant Reservoir

Engine Coolant Reservoir for Mercedes-Benz S-Class

Restore proper coolant expansion and recovery with the Vaico V30-8406 engine coolant reservoir. This OE-style replacement is built for Mercedes-Benz S550, S600, S63 AMG, S65 AMG, and Maybach S550 / S600 applications that use the specified reservoir with cap and sensor.

VAICO Expert Kits+ groups the needed components into one box for a more complete repair approach. The reservoir measures 243 mm long, 192 mm wide, and 205 mm high, and it is rated to 2 bar for the cooling system pressure specification.

Key Features

• Engine coolant reservoir for Mercedes-Benz cooling system service
• VAICO part number V30-8406 for direct catalog identification
• Includes lid/cap and sensor application details as specified
• 2 bar pressure rating for the cooling circuit
• Dimensions: 243 mm length, 192 mm width, 205 mm height
• OE cross-reference: 222 500 08 49 KIT / A2225000849

Detailed Description

The Vaico V30-8406 engine coolant reservoir is a replacement expansion tank for select Mercedes-Benz luxury sedans and AMG models. It is listed for 2014-2017 Mercedes-Benz S550, 2015-2017 S600, 2014-2017 S63 AMG, 2015-2017 S65 AMG, plus 2016-2017 Maybach S600 and 2017 Maybach S550. This part number, V30-8406, is referenced to OE number 2225000849 for the same application.

VAICO Expert Kits+ is the brand’s packaged repair line, combining the required components into a single service solution. For buyers searching for a Mercedes-Benz S550 coolant reservoir with cap and sensor, or a Mercedes-Benz S63 AMG expansion tank replacement, this listing provides the fitment and dimensional details needed for a confident match.

What It Helps Address

• Cracked or aging coolant reservoir housing
• Coolant loss from reservoir-related leaks
• Pressure retention issues in the cooling system
• Faults tied to reservoir cap or sensor service needs
• Cooling system maintenance on Mercedes-Benz S-Class and Maybach models

Installation Notes and Tips

Verify the OE number, reservoir dimensions, and sensor/cap configuration before installation. Confirm the vehicle application against the existing tank and cooling system layout on the Mercedes-Benz S550, S600, S63 AMG, S65 AMG, Maybach S550, or Maybach S600. Inspect hoses, seals, and the mounting area during replacement to help prevent repeat leaks.

Quality Assurance

VAICO supplies aftermarket replacement parts for European vehicles and packages this item under its Expert Kits+ line for a more complete service-oriented solution. Cross-reference part numbers include 222 500 08 49 KIT and A2225000849.