
Normally, the drainage holes on car doors are usually located on both sides at the bottom of the door. Here is some relevant information about the E-Class sedan: 1. Introduction: The Mercedes-Benz E-Class sedan is a mid-to-large-sized high-end business sedan, coupe, and station wagon developed by Mercedes-Benz, positioned between the C-Class and S-Class. 2. Features: A relaxed and comfortable atmosphere is standard in the E-Class sedan, thanks to the automatic climate control system, which allows passengers to select their preferred temperature. 3. Seat Configuration: Standard seat upholstery is fabric (for the Classic and Elegance model lines) or a combination of fabric and ARTICO artificial leather (for the Avantgarde model line). Luxury genuine leather upholstery is also available as an option, with Nappa leather upholstery offering a more luxurious, durable, and breathable option.

















I often see E-Class owners asking about the location of drain holes, which are actually found in many places. The main ones are at the bottom of the doors—just feel along the lower edge of the door, and you'll find several small holes where rainwater drains out to prevent water accumulation and rust. There are also drain holes around the sunroof; look along the four corners of the sunroof channel, and you'll see tubes extending down to the wheel arch liners. Under the hood, near the base of the windshield, there are small holes to drain dirty water during rain. I recommend regularly cleaning these channels using a thin wire or an air gun to gently clear any debris, like leaves, to avoid water leaks or unpleasant odors inside the car. Proper maintenance of these can significantly extend your car's lifespan.

The drainage holes on the E-Class are designed to be very discreet. It took me several years of driving this car to fully locate them. The door drainage holes are positioned at the very bottom inner edge of the doors - you'll need to crouch down to spot them. For the sunroof, there are small holes at all four corners with tubes leading to the wheel arches. I sometimes test them with water during car washes to check for blockages. The row of small holes beneath the windshield under the hood is equally important, as they can easily clog with heavy rainfall. I recommend checking these quarterly and simply clearing any debris. Neglecting these can lead to water leakage inside the car, and dealing with soaked carpets can be quite troublesome.

I regularly clean the drainage holes of my E-Class, especially those around the sunroof, as they are most prone to clogging. The holes are located at the edges of the sunroof channel, with tubes extending to the wheel arches at all four corners. There are also small holes beneath the doors. I've learned a handy trick: use a high-pressure washer with a gentle stream to flush the holes and test the flow rate, which helps determine if they need unclogging.

The drainage holes of the E-Class are mainly distributed in several areas. For example, small holes can be felt at the bottom of the doors, there are downward pipes at the four corners of the sunroof, and there are also drainage holes under the hood below the windshield. I clean them regularly, using an air gun or a soft brush to gently unclog them to prevent debris buildup. Keeping these areas dry can prevent rust and air conditioning odors, extending the lifespan of the components.

I noticed that the drainage holes of the E-Class are mostly located at the bottom edge of the doors, corners of the sunroof, and under the hood near the windshield. Cleaning them yourself is quite simple—just use a thin rod to poke through the holes. Neglecting maintenance can lead to clogging, causing rainwater to accumulate inside the car, which may damage electronic components or lead to mold growth, which is quite troublesome.


