What Causes the Squeaking Noise in the Rear Door of a Mercedes-Benz?
3 Answers
Mercedes-Benz rear door squeaking noise may be caused by stiff hinges, aging seals, etc. Specific causes and solutions are as follows: Stiff hinges: Everyone operates with different force and amplitude, leading to significant wear on the door hinges. Over time, this can result in the door not closing tightly, causing squeaking noises. Solution: Keep the door hinges lubricated to reduce wear and prevent rust. Aging seals: There is a rubber seal around the door to prevent wind and rain from entering the cabin. Once the seal ages and becomes damaged, it can cause cabin leakage, increasing wind noise and other squeaking sounds while driving. Solution: Replace the seal.
I've been running an auto repair shop for over a decade and have encountered many cases of Mercedes rear door squeaks. The most common issue is lack of lubrication in door hinges - after frequent opening/closing they'll start creaking, which can be fixed by applying grease. Another frequent cause is hardened/deteriorated door seals rubbing against the body, especially noticeable in cold weather - rubber conditioner can help. Loose trim panel clips are also common, like when reassembly isn't done properly causing rattles over bumps. Worn door lock mechanisms produce clicking sounds, and sticky child locks can also make noise. Try lubricating hinges and seals first; if noises persist, remove door panels to inspect internal components. Gently closing doors helps prolong part lifespan.
My Mercedes-Benz C-Class rear door also had strange noises. At first, there was a rustling sound on uneven roads. I checked myself and found coins vibrating in the door storage compartment—emptying it eliminated the noise. Later, a squeaking sound appeared when going over speed bumps. A friend suggested it was a seal issue, and applying Vaseline improved it. However, after a few months, the noise worsened. At the dealership, they found the window regulator bracket bolts inside the door panel were loose. The mechanic said it could be due to bumps loosening the screws or water ingress from car washes causing rust. Now, I regularly lubricate the door hinges and ask the technician to check the seal condition during every service. I recommend noting when the noise occurs and its characteristics to help identify the cause faster.
