This external socket is different from the original car.

Remove the motor, and the materials used inside are still different from the original factory. This was also the reason why I later chose to install the original bottom shell.

This place is also different from the original factory. In order to avoid trouble during installation, I suggest replacing the original bottom shell.

The original factory fan began to remove the bottom shell.

The original factory’s external plug interface looks like this.

Must be washed.

Finally, it was assembled with the old bottom shell and installed smoothly.
After starting and testing the machine, the entire system became quiet and I was very satisfied.

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Moderator Editor:
The blower used in Mercedes-Benz models will have a “squeaking” abnormal sound after a few years because it uses oil-retaining bearings. Oil-retaining bearings are sintered bodies made by powder metallurgy and are used in working environments that are not easy to lubricate. However, special lubricating oil needs to be filled regularly, but vacuum pressure is required. Ordinary grease application methods are not durable. Therefore, if there is any abnormal sound, it is better to disassemble and replace it directly, which also avoids the trouble of disassembling and assembling multiple times.
Students in our forum “Mercedes-Benz in Mercedes-Benz” reported that the lubricating blower effect is not durable. It is not recommended to lubricate the blower and should be replaced directly. He also recommended the brand blower from Taobao store “Baojue Auto Parts”, so everyone can buy it. The price is 220 yuan. Before purchasing, you must remember to contact customer service to confirm the product grade and warranty period.
Removal method of blower: www.xcar.com.cn/bbs/viewthread.php? f=touch&tid=21441564#zoneclick=101229

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