Mercedes-Benz 300TE milky coolant issue with overheating and coolant loss on Mercedes-Benz 300TE

Submitted by Ronmoney · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mercedes-Benz 300TE owners report experiencing a milky coolant issue, which can indicate serious problems such as a blown head gasket or a cracked cylinder head, leading to coolant mixing with engine oil. This condition necessitates prompt inspection by a professional mechanic to prevent significant engine damage. Additionally, some owners face overheating, often caused by a malfunctioning cooling system or coolant leaks, which can warp or crack engine components if not addressed quickly. Furthermore, coolant loss is frequently attributed to leaks within the cooling system, including those from a leaking head gasket or cracked cylinder head. Regular checks of the coolant level and immediate attention to any leaks are crucial to avoid engine damage. It is strongly advised that owners consult a qualified mechanic for a comprehensive inspection and necessary repairs to mitigate the risk of severe damage and costly repairs in the future.

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Mercedes-Benz 300TE vehicles with this problem

Average mileage: 180,000 miles
(180,000 - 180,000)

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