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fits e.g. Mercedes-Benz A-Class (W168) (please check exact vehicle application) Length: 89.4mm Housing Colour: Black - Corresponds to the original part in colour: Black HELLA coolant level sensor detects low coolant levels by measuring electrical resistance-activates a dashboard warning if air is present instead of coolant. Installed at a low point near the radiator, it ensures a reliable detection of coolant loss to help prevent engine overheating. Robust HELLA design ensures long-lasting durability and precise measurement, with strong resistance to vibrations, dirt, and harsh conditions. Manufactured to OEM quality standards for a precise fit and seamless integration with your vehicle. Please check the OEM number to ensure correct fitment for your vehicle