2015 Mercedes-Benz E260L (W212) Thermostat Replacement-Cleaning the throttle

  3
 September 3, 2024
Before a post, is to replace the original factory foot glue, after the change, the cold start or AC are not shaking, very stable, in the replacement time, the master has a hint that the thermostat is a little seepage antifreeze, but there was no alarm, there was no repair.
Just in front of time, added 4L blue star glass water, as a result, after 2-3 days, it was suggested that the glass water was insufficient, not even with a little salt. 4S was sent to the whole car for disinfection and sterilization. By the way, I found that there was a tube that seemed to have a leak. I reconnected it, and if I didn’t see it in the leak, I filled it with glass water and let me take a look.
When doing the whole car inspection, the software prompted the thermostat failure, the reception gave me a call, went to the front of the car, removed the cover, showed it to me, said that there was leakage, but there was no alarm in the car, the engine did not turn on the light, the mechanic said, this is very serious, it should be corroded, I let the quotation, and so on are all repaired, the quotation is 3000 + (accessories 1000mm, a rubber ring 200, need 4, 4 bottles of antifreeze 100 a bottle When processing 1000 +), it is also recommended that I hand in the activity of the old car owner with a discount of 780. I replied and considered it and finished the 4S thing.
Came back to Baidu to play the role of this thermostat, which seemed to be quite important, and then found a quotation for foot glue last time. The price was reasonable. I drove directly to change it today. The following is the process. I took some pictures because the weather was too hot. Keep taking pictures to affect the master’s work.
The whole process is still very smooth, after filling, pour 2 bottles of antifreeze, pour some water, light the fire, and then add half the bottle, and let me take the remaining half of the bottle back to see what happens tomorrow morning.
The weather in Xiamen is still very hot, there is only one electric fan, it is really not easy to change it for me. The master said that the fault of the M274 engine is very few, and at most it is the problem of the tube. The thermostat is a common problem. It is said that the time is up to change. There is also a small circulating water pipe for me to pay attention to. If it leaks, it will be troublesome, and you can have a chance to change it.
If they are all from the original factory, we will consider doing maintenance and oil change here in the future.

It is probably already like this, there is a lot of exudation outside, it should be antifreeze.

Underneath also corroded a lot of things, did not call the police, hurriedly changed first.

This is the thing with two tubes. The master said that this generation is easier to change, and there are more things to be removed in the back.

After taking down the problem, we can see that it has seeped out in all directions.

The thermostat removed, the link has been seriously corroded.

Details of the interface.

This is a new thermostat, which is contained in a bag. last time, the foot glue was changed from here, and the moderator identified it as the original factory. This should be the same, right? Insure it for two years.

The comparison between the new thermostat and the old thermostat looks like a big problem.

After the replacement, I added two and a half bottles of antifreeze + water, and then told me that I was worried about the air in it. Let me go back and put it all night. I would like to unscrew the cold car tomorrow morning and have a look at it. If it is missing, just add the half bottle.

This is said to be the original factory. I won’t read it. I’m not sure.

This is called the throttle. The master asked me if I had washed it, but I said no. He said I took it down and cleaned it for you, then sprayed two kinds of things, and then wiped it and installed it. I think it’s quite clean.

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