How Many Liters of Transmission Fluid Are Generally Needed for a Mercedes-Benz Transmission Fluid Change?
2 Answers
For a Mercedes-Benz transmission fluid change, if done manually (gravity drain), approximately four to six liters are required; if using a fluid exchange machine, around nine to twelve liters are needed. The replacement intervals vary for different models. Below are the recommended transmission fluid change intervals: Manual Transmission: Manual transmission fluid is generally recommended to be changed every three years or approximately 100,000 kilometers. Automatic Transmission: Automatic transmission fluid is typically recommended to be changed every two years or around 40,000 kilometers. Continuously Variable Transmission (CVT): CVT fluid is usually recommended to be changed every two years or about 60,000 kilometers. The methods for changing transmission fluid are as follows: Drain the fluid by loosening the drain plug at the bottom of the transmission and then refill. Remove the transmission oil pan directly for draining and refilling: This method is more thorough than the previous one, as it removes impurities from the bottom of the oil pan. Use a circulation machine to change automatic transmission fluid: Dynamic fluid exchange with an intelligent circulation machine can filter and clean sludge and impurities inside the automatic transmission.
I've been working in automotive repair for many years. Changing the transmission fluid for a Mercedes typically requires 5 to 10 liters, depending on your model. For example, smaller cars like the A-Class or C-Class may need about 5 to 6 liters for a gravity drain and fill. Larger SUVs like the GLS might require up to 8 liters. If you use a flush machine for a thorough cleaning, it can go up to around 10 liters. Why such a big difference? It's due to variations in transmission size and design. Older models tend to retain more residual fluid, requiring additional new fluid. When selecting transmission fluid, I recommend using Mercedes-Benz certified products—don't cut corners by mixing in off-brand fluids. The recommended interval for a fluid change is generally every 60,000 kilometers, and it's also a good time to inspect the transmission filter. Many Mercedes models have built-in filters that should be replaced simultaneously. Neglecting this maintenance can lead to overheating or transmission failure, which is extremely costly to repair. For safety, I always recommend going to an authorized service center—they have precise measuring tools.