When to Change Transmission Oil? BMW and Mercedes 2026 Period Table
May 20, 2026 — APD Uzman Ekibi
When Should Transmission Oil Be Changed? BMW and Mercedes 2026 Period Table
Transmission oil is a critical component for maintaining a vehicle's engine performance and overall health. Especially in premium automotive brands like BMW and Mercedes, changing the transmission oil is extremely important for the longevity and performance of the vehicle. In this article, we will examine the transmission oil change intervals for BMW and Mercedes vehicles and provide tables valid until 2026. We will also discuss why changing transmission oil is so important and which factors affect these intervals.
The Importance of Transmission Oil
Transmission oil is necessary to ensure the proper functioning of the vehicle's transmission system. The oil reduces friction between gears, preventing wear and helping to dissipate heat to keep the system cool. Failing to change transmission oil on time can lead to various issues:
- Gear wear and failure
- Transmission slipping and performance loss
- Overheating and system failures
Functions of Transmission Oil
The main functions of transmission oil are as follows:
- Reducing friction
- Ensuring heat distribution
- Preventing corrosion
- Assisting in cleaning parts
BMW Transmission Oil Change Intervals
The transmission oil change intervals for BMW vehicles can vary depending on the model and production year. Generally, BMW recommends changing the oil every 60,000 km or 4 years for automatic transmissions, and every 100,000 km or 6-8 years for manual transmissions. However, these intervals may differ based on the vehicle's operating conditions.
BMW Transmission Oil Change Table Valid Until 2026
| Model | Automatic Transmission (km) | Manual Transmission (km) |
|---|---|---|
| E46 | 60,000 | 100,000 |
| F30 | 60,000 | 100,000 |
| X5 (F15) | 60,000 | 100,000 |
| 3 Series (G20) | 60,000 | 100,000 |
Mercedes Transmission Oil Change Intervals
The transmission oil change intervals for Mercedes-Benz vehicles also vary from model to model. Generally, it is recommended to change the oil every 80,000 km or 5 years for automatic transmissions, and every 100,000 km or 6-8 years for manual transmissions. However, the vehicle's operating conditions and the type of transmission can also affect these intervals.
Mercedes Transmission Oil Change Table Valid Until 2026
| Model | Automatic Transmission (km) | Manual Transmission (km) |
|---|---|---|
| W204 | 80,000 | 100,000 |
| W213 | 80,000 | 100,000 |
| CLA (C117) | 80,000 | 100,000 |
| GLC (X253) | 80,000 | 100,000 |
Important Considerations for Transmission Oil Change
There are several important factors to consider during a transmission oil change:
- Oil Selection: Choosing the right oil for BMW and Mercedes vehicles is very important. These brands typically recommend specific oil standards. For example, oils that meet BMW's LA 2 or LA 3 standards should be preferred.
- Oil Level Check: Regularly checking the transmission oil level helps in early detection of leaks or excessive wear.
- Professional Service: Transmission oil changes should be performed by experts. Incorrect procedures can damage the transmission system.
Transmission Oil Change Process
The transmission oil change process generally includes the following steps:
- Draining the old oil
- Replacing the oil filter
- Adding new transmission oil
- Checking the oil level
Conclusion
Changing transmission oil is a critical maintenance procedure for BMW and Mercedes vehicles and should be performed regularly to extend the vehicle's performance and lifespan. The above-mentioned period tables are valid until 2026 and will help you plan according to your vehicle's model. In case of any doubts, do not forget to seek professional support. For more information, you can contact us. To reach us via WhatsApp, click here.
FAQ
1. How often should transmission oil be changed?
For BMW and Mercedes vehicles, automatic transmission oil should generally be changed every 60,000-80,000 km or every 4-5 years. For manual transmissions, this interval is recommended to be 100,000 km or 6-8 years.
2. What happens if transmission oil is not changed?
If transmission oil is not changed, it can lead to serious problems such as gear wear, slipping issues, and overheating.
3. Which transmission oil should be used?
Oils that meet the appropriate oil standards for BMW and Mercedes vehicles (for example, BMW LA 2 or LA 3) should be preferred.
4. How is transmission oil changed?
Changing transmission oil involves draining the old oil, replacing the oil filter, and adding new oil. It is recommended that this process be performed by experts.
5. How can I check the transmission oil level?
The transmission oil level can usually be checked through a control cap located under the vehicle. However, it is advisable to seek support from a professional service for this process.