This is a Mercedes-Benz C160, equipped with a 7AT hand-integrated gearbox, which has been running for more than 100000 kilometers for 13 years. I haven’t changed the gearbox oil yet. I see that the effect of changing the gearbox oil is very good, so I want to change the oil and maintain it.
First, let’s take a group photo of the original gearbox oil, differential oil, oil pan sealing ring, filter net and so on.
The oil pan sealing ring is installed on the oil pan, it is made of rubber, it will age when it is in a state of high temperature all the year round, and the sealing performance will decrease, so it is easy to leak oil, so it is recommended to replace it when changing the oil.
The original gearbox oil brought by the car owner.
I believe that many car owners will encounter the situation of buying inferior gearbox oil, and there is no difference between changing gearbox oil and not changing it. Xiaobian reminds you here that when you buy gearbox oil, you must buy the original factory oil. no matter which car you are, the original oil is guaranteed in quality and quantity, and the maintenance effect is very good. As the saying goes, “the original match is the best and most lasting.”
First release the old gearbox oil, and then disassemble the Mercedes-Benz C260 gearbox oil pan.
Release the Mercedes-Benz C260 transmission oil.
Prepare to remove the Mercedes-Benz C260 gearbox oil pan.
After release, remove the oil pan. It can be seen that the strainer is already dirty.
Comparison between new and old strainer
Why change the gearbox oil?
Because the gearbox oil also has a shelf life, it will deteriorate and dilute after a long time, the lubrication will also be reduced, and the car will not run smoothly.
The mechanical operation of the gearbox can not do without the lubrication of oil. at the beginning, the oil of the gearbox is very dense and thick, which is very lubricated inside the gearbox and provides a certain pressure to the interior of the gearbox. In this way, the internal machinery of the gearbox will operate very forcefully and smoothly. During the mechanical operation of the gearbox, it is inevitable that there will be friction iron cutting and so on, mixed with oil, and so on, a lot of iron cutting impurities will accumulate in the oil over the years, these iron cutting impurities and oil will operate together and flow in the gearbox machinery, the internal machinery will inevitably be clogged and stuck, to cite a most classic example, such as the valve body inside the gearbox, which is filled with oil. There are many small spool and valve channel, the small spool is moving up and down in the valve channel to complete the work, which belongs to piston operation. If the gearbox oil becomes dirty, turbid, iron cutting and other rubbish inside the oil may lead to the stagnation between the small spool and the valve path, the operation is impenetrable, and then the car will also have some minor failures, such as sudden setbacks. The maintenance master suggested that the gearbox oil should be changed in three years or 60,000 kilometers, the effect would be better, of course, because everyone’s driving condition and habits are different, the time and mileage of changing oil will increase or decrease accordingly, so it is recommended that all motorists should not drive violently in the process of driving.
After putting the gearbox oil from the oil pan, prepare to drain the oil from the small opening of the torque converter. Only the gearbox assembled by Mercedes-Benz can discharge oil from the torque converter, which is a special perk of Mercedes-Benz.
Start picking out (opening) the torque converter opening in the Mercedes-Benz C260 gearbox.
Then release some of the old oil from the small opening of the torque converter in the Mercedes-Benz C260 transmission.
Drain the old oil from the small opening of the torque converter in the Mercedes-Benz C260 transmission.
It really put a lot of it.
We must carry forward this welfare and let more people know.
Clean and install the oil pan.
After changing the gearbox oil, the owner of the car is required to clean the radiating oil pipe (which dissipates heat to the gearbox through the water tank). The arrow on the picture refers to the radiating oil pipe, and the cleaning pipe is connected on the picture.
Start cleaning the Mercedes-Benz C260 heat dissipation oil pipe, point the cleaning agent at one mouth of the heat dissipation oil pipe, take the bottle to catch the dirty water on the other side of the pipe, and use a cloth to prevent air leakage.
Compared with the old oil from the gearbox, the dirty water discharged from the cleaned heat dissipation tubing is on a par with the old oil discharged from the gearbox.
Dry with an air gun after cleaning.
Pour new oil into the gravity tank and get ready to start the gravity change.
Mercedes-Benz C260 gravity oil change.
Start changing the Mercedes-Benz C260 gearbox oil by gravity. The gravity oil change is carried out when the car is at rest, and the new oil is pushed through the pipe to the inside of the gearbox through the torque of the electric brick in the technician’s hand. In general, gravity oil change is a general cycle of oil change, about 5 liters, but the current Mercedes-Benz A / B/C/E series has gradually changed, and the old oil can be released through hydraulic torque converters. In this case, gravity oil exchange can be changed to about 9 liters, which is better.
However, I would like to say here that the gravity oil change is carried out when the car is still, the gearbox does not work and the oil does not flow, so the iron cutting and garbage deposited on the internal parts of the gearbox cannot be discharged well.
The oil change of the circulation machine is changed when the car starts, the gearbox starts to operate, the oil also starts to operate, and the iron and impurities precipitated inside begin to flow with the oil, so that it can be discharged well. It can generally be changed to nearly 12 liters, clean and thorough.
All right, this Mercedes-Benz C260 gearbox 7AT oil change record is shared here, like can follow up, there are a large number of wonderful updates, have oil change experience can also share the experience to the comments area, friends together to discuss, analysis, for automatic transmission problems can also ask me, to help you judge the problem, only the accurate judgment of the problem, in order to save unnecessary maintenance costs!
XavierPullman 
7 
September 11, 2024 
