Mercedes-Benz Air Conditioning Vent Hose For Model 64531375972

Core location (under the chassis on the passenger's side)

Directly under the evaporator box

Condensate generated during air conditioning operation is discharged directly to the outside of the vehicle through the drain hose at the bottom of the evaporator box.

Specific location: located in the passenger foot area of the chassis in the center of the right, you need to lean over to observe the chassis can be seen a thin flexible tube (diameter of about 0.5cm)

Other auxiliary drain ports

Inside door tape

Some Mercedes-Benz models (such as the E-Class) hide drain holes inside the sealing tape at the bottom of the doors to drain water that seeps into the door panels.

Sunroof four-corner guides

Sunroof drain holes are not air-conditioning-specific, but clogging will cause water to seep into the headliner. They are located at the four corners of the sunroof slider and are visible when the sunroof is opened.

Lower edge of the front windshield of the engine compartment

There are gutters at the roots of the windshield wipers on both sides to drain rainwater flowing into the engine compartment, which are not related to air conditioning drainage but need to be cleaned regularly.

Clogging risk and unblocking advice

Consequences: A clogged drain hose can cause condensate to back up into the passenger footwell, triggering short circuits, floorboard rusting, or even a vehicle blackout (Mercedes-Benz has recalled 30,000 E-Class vehicles for this reason).

Unclogging methods:

Clean the hose with a fine wire or special pipe cleaner;

Replace the air-conditioning filter every year to reduce the entry of impurities;

Avoid long-term parking in places where fallen leaves accumulate.

Tips : If the passenger floor is wet or the air conditioner smells bad, check the chassis drain hose for dislodgement or clogging as a priority (you can start the air conditioner and observe whether water flows out of the chassis)

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