Seats with multiple contours

[drummer]

I own a 2015 e350 coupe equipped with multicontour seats. Similar to other objects, they do not expand in size, however I can feel a little amount of air being released when I activate the deflation process. The fuse remains intact. I have located the pump concealed beneath the foam in the trunk. When attempting to inflate a seat, I can perceive the pump's vibrations upon placing my palm on it, however it emits little noise. Both the passenger and driving seat serve the same function. As I have only had the automobile for a week, I am currently not acquainted with its features. However, I am curious if anybody else has experienced similar issues and if they have any suggestions for further troubleshooting.
I appreciate your assistance beforehand.
Postscript, I have a strong affection for my just acquired automobile.

 

[WiseSage]

Have you made a purchase from an authorised dealer? If the answer is affirmative, instruct them to diagnose and rectify the issue within the warranty period.
If you are engaging in a private sale, it is advisable to seek the services of a reputable Mercedes-Benz specialist who operates independently from the official dealership network.

[drummer]

I appreciate your prompt response.
Although I own a limited warranty, I refrained from using the claim limit to save it for any future occurrences of more severe issues. If necessary, I can do without the adjustable chairs, but I am willing to try adjusting them myself out of curiosity. I may choose to bring it to an independent technician nonetheless, in order to get a diagnosis and make a decision based on that assessment.

[alpaco45]

The seller bears responsibility in accordance with the Sale of Goods Act, making the use of a guarantee unnecessary.

 

[drummer]

Indeed, an astute observation. I will initiate a series of telephone conversations.

[clk320x4]

This topic has a link that "MAY HELP". Best regards.

[drummer]

I will investigate this more since it closely resembles the symptoms I am experiencing. Appreciation expressed.

[Matt865]

Have you verified the pump's output when the motor is operational? There may be a malfunction with the pump or a leakage of air in the pipes. The pump will consist of four chambers and will use little rubber diaphragms. It is possible that one of these diaphragms has malfunctioned.

I hypothesise that the issue may be attributed to a pipe that is allowing liquid to escape. However, I recommend examining the output of the pump as a first step.

[drummer]

I am uncertain about your reference to the motor (is this an additional component for the seats?), but when I start the car's ignition and attempt to inflate the seat, I hastily go towards the trunk and can perceive the pump generating vibrations from behind the foam enclosure. The lack of noise makes it unclear whether the device is functioning correctly or not. If my observation is correct, the pump seems to possess two protruding pipes, while there is a possibility of more ones. The pump itself has not been seen since it is enclosed in a black plastic container. In my opinion, it is likely the subsequent aspect to investigate.
After referring to David's provided link, I inspected the pipe connections located at the front of the chairs. Upon examination, I saw that the joints were intact and free from any cracks. I have not yet removed the back of the chairs to inspect for any contents.
Given that the fuse is intact and I can see the pump's activity, I assume that there is likely a little leakage, but I have yet to determine its source. Are there any other conspicuous spots where they fail with more frequency?

[Matt865]

Within the black box, there is a motor and pump. To determine whether the pump is providing air, you must detach the pipes and activate the motor. In my situation, I was required to unpack the box and dismantle the motor and pump due to the motor's malfunction.
 

[drummer]

Appreciation expressed. I will verify the output. I believe there may be a little issue with the output, as I can detect a slight release of air while attempting to deflate. However, the inflation of the chambers does not seem to be evident. Is the pump audibly noisy or am I seeing it as less audible due to its enclosure in foam?
According to another discussion, the seat air chambers can only be altered for a limited duration upon starting the automobile. Initially, I found the noises to be peculiar. However, when doing a diagnostic examination, it seems that my first impression was indeed accurate. Perhaps it is also a flaw. I am curious to understand the functionality of the controls, since it seems that they are not linked to any electrical components, but rather only reliant on the air pipes.

[drummer]

There is no text provided. Here is a little update. It has been discovered that a former owner attempted to repair the air bolsters in the passenger seat, but was unsuccessful in doing so. Essentially, they applied an excessive amount of tape to a recent connection, when all they needed to do was use a little more force to properly attach the pipe. Fortunately, the repair was provided at no cost.
According to another source, Mercedes has communicated that the seat bolsters may only be altered during the first 3 minutes of the car's ignition. Despite some claims of nonsense, I have personally found this to be accurate. I am able to modify the position of my seats for around 3 minutes. However, after that duration, the pump ceases to function and I must restart the vehicle in order to make any more adjustments. There might be a potential defect or that could be the standard configuration for my specific model. Regardless, the system is now functioning well and I would want to express my gratitude to everyone for their guidance and assistance.

[Ortsmatt]

It is important to note that the seat module has the capability to detect a leak and will deactivate the pump within a few minutes. This is done in order to avoid the pump from experiencing burnout.

[drummer]

Oh, how intriguing. Considering that the bladders remain inflated after being inflated, it is likely that there is a little leak. However, additional investigation is necessary to confirm this. Under typical circumstances, at what specific moment should the pump cease its operation? Is it convenient to inspect or reach the bladders? If it is a career that requires standing, I believe I will refrain from pursuing it.

[Ortsmatt]

Inspecting or changing bladders is a task that requires removing the seat. Have you removed the seat-back cover in order to have access to the control modules? Are the settings of the air bladders in both front seats equally responsive?

[AMG33D]

To verify the functionality of the pump, simply detach the air line from its connection point at the front of the seat. Typically, the pump is the component that malfunctions rather than the motor. Consequently, if the compressor's motor is operational but fails to generate any air pressure, the system will only operate for a little period before ceasing operation. A pronounced and forceful hissing sound emitted by the hose when disconnected and the motor in operation would suggest a well-functioning compressor. The inadequate air supply indicates that it is malfunctioning. The typical reason for their failure is a system leak, which causes increased operation to compensate for pressure loss.

[drummer]

I have not yet attempted this. I will attempt to locate a schematic illustrating the process of removing the covers. I lack complete certainty on the functions of the control modules. This afternoon, I removed the seat control adjusters on the driver side in order to apply a little amount of Vaseline around the seals of the 5 connections. However, after reassembling the adjusters (which was difficult), the seats no longer inflate and I can hear a faint hissing sound. Regrettably, I have exacerbated the situation. Apologies.

[drummer]

I will examine this and evaluate it. There was definitely air being pumped into the bladders, and the process was swift. Does this not imply that it is still functioning properly?