How many liters of transmission fluid does a Mercedes GL550 require?

1 Answers
DelAshley
07/30/25 1:56am
For a Mercedes GL550, manual transmission fluid change (gravity method) requires 4 to 6 liters; using a fluid exchange machine requires approximately 9 to 12 liters. Hazards of not changing transmission fluid: 1. Damage to the transmission's shift control mechanism; 2. Abnormal wear of gears and clutch plates inside the transmission; 3. Affects normal transmission operation, leading to valve body damage. Transmission fluid is different from engine oil. Although both serve lubrication purposes, they perform different functions and should not be confused. Differences: Engine oil is the lubrication oil for the engine system, possessing properties like oxidation resistance, anti-wear, and corrosion prevention. Transmission fluid primarily maintains cleanliness in the gear system and extends the service life of internal transmission components. Due to structural and operational environment differences between transmissions and engines, transmission fluid cannot be used as engine oil, nor can engine oil be used as transmission fluid.
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