How to Change the Oil in a Mercedes 9-Speed Transmission?

2 Answers
VonLeilani
07/28/25 10:12pm
Mercedes 9-Speed Transmission Oil Change Steps: 1. Secure the vehicle on a lift and remove the central and rear underbody panels of the engine; 2. Use tools to detach the quick-release locks on the oil pan, and replace the transmission oil filter along with the oil pan; 3. Add approximately 6L of transmission oil to the transmission. A completely drained transmission requires about 10L of transmission oil; 4. Finally, clean the oil pan and reinstall all removed components. The Mercedes E300 is a mid-to-large-sized sedan produced by Mercedes-Benz, featuring a front-end design identical to the imported version, with sharp lines for the separate high and low beams, creating a youthful and dynamic overall effect. In terms of body dimensions, it measures 5078mm in length, 1860mm in width, and 1484mm in height, with a wheelbase of 3079mm, making it a four-door, five-seater sedan.
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JordanAnn
08/12/25 2:45am
Changing the transmission fluid for a Mercedes 9-speed gearbox is something I've had years of hands-on experience with, and the key is to follow the steps carefully. First, lift the car securely with a jack, then use a wrench to loosen the drain plug and let the old fluid flow out completely into a pan. During this process, inspect the oil pan—clean out any debris to avoid contaminating the new fluid. Next, replace the filter, being careful not to damage the sealing ring. When adding new fluid, make sure to use genuine Mercedes ATF-spec oil, pouring it slowly with a funnel to prevent spills. After refilling, connect a diagnostic tool to check the fluid level, ensuring the temperature is within the normal range for accuracy. The entire process requires attention to detail, with tools like wrenches and scanners prepared beforehand. The transmission is delicate; using poor-quality or incorrect fluid can lead to malfunctions, so I recommend changing it every 50,000 km to avoid costly repairs later. DIY can save you a couple hundred bucks, but beginners might find it safer to visit a professional shop to prevent installation errors.
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