Expert Tips to Keep Your Transmission Working Like Clockwork


Whether you have a new or used Mercedes Benz, you must ensure its transmission system is working like clockwork if you want to enjoy the best experience from this beast. Unfortunately, things like heat, road grime, heat, and other elements that it is exposed to constantly can degrade even the best transmission like 9G Tronic or 7G Tronic. Another thing worth mentioning is that a Mercedes Benz transmission can cost a fortune if it breaks down. The good news is that, in this article, we have put down vital maintenance tips to ensure your Mercedes Benz never fails you. Read on to learn more.

Three Expert Tips to Keep Your Transmission Working like Clockwork

1. Know When to Service your Transmission

Different Mercedes Benz models have different recommended transmission service intervals. In most models featuring the 9g Tronic automatic transmission, the initial service interval is recommended at 40,000 miles. Most models actually advise that you take your transmission for a checkup once every 40,000 miles. To know the recommended service schedule, check your owner’s manual or consult an authorized Mercedes repair shop. Changing the transmission fluid is gravely important as a dirty one can cause problems that lead to costly repairs.

2. Prevent Transmission Fluid Leakage

All the latest Mercedes Benz automatic transmissions, including the 9G Tronic, come with electrical control signals that allow for the engine computer, the brake control system, and the transmission computer to work synergistically and deliver optimum performance. One common problem is the electrical connector plug leaking transmission fluid into the internal parts. The matter is made even worse since you normally cannot discern the leaks with your naked eyes. Also, your Mercedes Benz does not come with a dipstick that lets you check the fluid level. If there is the accidental leakage of fluid into the wire harness and it somehow finds its way to the TCU, it could lead to internal damage to the unit. A good mechanic specialized in Mercedes Benz will give your transmission system a good inspection to detect if there are signs of leakage of transmission fluid. And, you don’t have to wait for the problem to strike first. The best time to visit a mechanic is before you need them.

3. Check the Condition of Your Transmission Fluid

The transmission fluid condition is critical to the health of your Mercedes Benz transmission. Since the earlier versions of Mercedes Benz of 2006 and before do not come with a dipstick that allows you to check the transmission fluid yourself, the best thing is to take your vehicle to an authorized repair shop. They have the tools to check your transmission fluid at least once every year.

Managing The Mercedes Benz Transmission Fluid

The biggest mistake you can make is neglecting your transmission fluid. The fluid is crucial in lubricating the moving components of your Mercedes Benz transmission. The 7g automatic transmission requires a special type of fluid designed for it. On the other hand, a manual transmission will require oil. Between changing the transmission fluid, you may have to top off the fluid periodically.

It is recommended to regularly change the transmission fluid. How frequently you change this will depend on the instructions on your owner’s manual. If you are not sure, have a chat with your mechanic bout it to know precisely how frequently your transmission fluid should be changed. Failing to do this risks contaminating the transmission fluid of your car with metal shavings. These contaminants will only harm your vehicle’s transmission. If you fail to take your car for transmission change, chances are that you will have to replace the whole 9g Tronic transmission which could be extremely costly.

There are circumstances where flushing your transmission fluid may be more beneficial to your car than changing it altogether. When flushing out transmission fluid, a special type of equipment will be used to expel all the transmission fluid presently in your vehicle. After that, a special solution is then flushed through the lines to remove all contaminants in the system.

Signs Your Automatic Transmission Is Headed Out

Your Mercedes transmission system is what regulates your vehicle speed and it does this by controlling the power from the engine to the driveshaft and wheels. This makes it an incredibly vital component of your car. Fortunately, there are tell-tale signs of a malfunctioning transmission system. If you notice a whining or clunking sound, your car suddenly doesn’t respond properly when you step on the gas pedal, engine revving unprovoked, the car does not speed up, or it vibrates, it may be time to take your 9g Tronic automatic transmission for a checkup.

When is the best time to replace your Mercedes Benz Transmission Fluid?

When you notice some of the signs above, the best thing to do is book an appointment with a qualified and approved Mercedes Benz mechanic to change your transmission fluid. The best times are between 60,000 and 100,000 miles. Upon taking your car to a mechanic, it will be assessed to check its condition. The mechanic will look at the color and smell to make a decision. Healthy transmission fluid has a pinkish color. If it has a burnt smell to it, it is a sign that it needs replacing. And at the same time, one of our certified auto specialists can replace your transmission filter.


Whether your Mercedes is powered by a manual or automatic transmission like the 9G Tronic, one thing is clear: taking proper care of it is of paramount importance. Another advantage of keeping your car’s transmission in tip-top shape is that it can prevent you from paying dearly to fix a faulty transmission.

Taking your care for regular, scheduled tune-ups can spare you the pain of paying for costly fixes that would have been avoided. But not just any mechanic will do. Firstly, the mechanic has to specialize in fixing Mercedes Benz and have thorough knowledge about 9G and 7G Tronic transmission. Secondly, the mechanic has to be licensed and approved to do that work. This will ensure that you get the best service available.



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