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Hi mates, on my 220D 2019s front left seat had some issue. From 2-3 days i noticed that when i make right turn i hear from my left side (the car is with left wheel steering) a sound like there is an air leakage or a snake inside and make typical hiss sound. This is only on driver's seat, the passenger seat is fine, and only on the left backrest side. The right one is working perfectly and from time to time the left is working too. But sometimes it wont move and i hear the noise. I suspect that some hose is putted out. I will check it tomorrow with Star but i'm 80% sure that the problem is disconnected hose. Does someone know where the hose is and how to located it ? Do i need to open the seat from side or from the back to check it ? An is it common issue because this is my first Benz with active multi contour seats ?
EDIT: The problem is cracked side bladder bolster.
Last edited by Klimfilt; Sep 19, 2022 at 06:15 AM.
Remove backrest cover to expose lines (photo 1) if fine, you will need to remove/disassemble backrest valve block is located forward of frame (photo 2) see attachments.
Last edited by konigstiger; Sep 17, 2022 at 10:42 AM.
Mani thnaks @konigstiger !! The problem was burst side bladder on my driver seat (see pics). Now im trying to find a proper solution to fix it. I saw videos where i can use iron, but it not seems to be a long time solution. Is there a chance to replace only the cracked bladder and what's the part number for it ? Or just i should use some vinyl patch with glue and duck tape to secure it ? I'm open to different solutions, but if MB sold bladders separatley i will buy one. But if i should buy the whole kit for one seat i will pass.
EDIT: Is there a way and how-to guide to remove the side bladder + the plastic support ? This will save me a lot of efforts to fix it.
Last edited by Klimfilt; Sep 19, 2022 at 05:46 AM.
Mani thnaks @konigstiger !! The problem was burst side bladder on my driver seat (see pics). Now im trying to find a proper solution to fix it. I saw videos where i can use iron, but it not seems to be a long time solution. Is there a chance to replace only the cracked bladder and what's the part number for it ? Or just i should use some vinyl patch with glue and duck tape to secure it ? I'm open to different solutions, but if MB sold bladders separatley i will buy one. But if i should buy the whole kit for one seat i will pass.
EDIT: Is there a way and how-to guide to remove the side bladder + the plastic support ? This will save me a lot of efforts to fix it.
i think i have this issue as well. when cornering with a left turn the right side bolster puffs up quite aggressively. the left side is quite weak and sometimes it won't operate at all
i think i have this issue as well. when cornering with a left turn the right side bolster puffs up quite aggressively. the left side is quite weak and sometimes it won't operate at all
did you ever find a solution?
Well not yet.... i've left it as it was and i'm searching for a car donor where i can take only the bladder which i need, because MB sell the whole pack together.
Well not yet.... i've left it as it was and i'm searching for a car donor where i can take only the bladder which i need, because MB sell the whole pack together.
what's the part # for this?
i'm wondering if i just have a slight leak at the hose or something because it does fill but feels noticeably weaker on that side. every once in awhile it won't allow me to inflate at all but shut down and restart fixes it (though still weak on that side)
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and make typical hiss sound. This is only on driver's seat, the passenger seat is fine, and only on the left backrest side. The right one is working perfectly and from time to time the left is working too. But sometimes it wont move and i hear the noise. I suspect that some hose is putted out. I will check it tomorrow with Star but i'm 80% sure that the problem is disconnected hose. Does someone know where the hose is and how to located it ? Do i need to open the seat from side or from the back to check it ? An is it common issue because this is my first Benz with active multi contour seats ?
