Dynamic seats always works when car starts but stops working after around 20 minutes
MBWorld Fanatic!
Joined: Oct 2021
Posts: 1,196
Likes: 636
From: Iowa
2008 CL550, 2022 EQB 300, 2023 EQS 450 4Matic
Yes, you are correct about the location on mine. The CL is just the coupe S class. They used to call it CL, before they switched to S coupe in 2014. Everything is the same except obviously some body parts, and some interior parts.
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Member
Joined: Feb 2003
Posts: 76
Likes: 2
2009 S450 4Matic, 2015 G550
Just an update, I have taken the pump out from the trunk, check all the connections there, doesn't seems to be any leak from there, I did it in my garage late at night when it was very quiet and I have someone in the car adjusting the seats, the pump works fine and no hissing when holding air from there. So probably next step is to take out the side bladder since most of you guys had experience a leak there. But like BOTUS saids too really none of those features are important or I have desire to use it at all too, I guess I will just need a very chill weekend to motivate me to take the next step.
MBWorld Fanatic!
Joined: Oct 2021
Posts: 1,196
Likes: 636
From: Iowa
2008 CL550, 2022 EQB 300, 2023 EQS 450 4Matic
Update for me...No hissing in the trunk area, but after shutting off the car, I hear a leak somewhere in the backrest. It is not subtle, either. I'm assuming this is not a designed pressure relief post shutting off (someone please correct me if I'm wrong). I'll take off the back panel later this week and hopefully can identify what is leaking. I'm surprised, because I thought I had replaced everything that could go wrong in the backrest. I also sat in the passenger seat and turned on the massage--way more pressure as the unit cycles through. So, the driver side is just not able to build enough pressure, and shuts down. With that said, it has never worked correctly and cuts off after one cycle, so I think I may have more than one problem.
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,142
Likes: 1,293
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Update for me...No hissing in the trunk area, but after shutting off the car, I hear a leak somewhere in the backrest. It is not subtle, either. I'm assuming this is not a designed pressure relief post shutting off (someone please correct me if I'm wrong). I'll take off the back panel later this week and hopefully can identify what is leaking. I'm surprised, because I thought I had replaced everything that could go wrong in the backrest. I also sat in the passenger seat and turned on the massage--way more pressure as the unit cycles through. So, the driver side is just not able to build enough pressure, and shuts down. With that said, it has never worked correctly and cuts off after one cycle, so I think I may have more than one problem.
Tank was about $350 when I replaced mine when the valve alone was not available from MB. It is easily changeable valve if you could buy one. I bet in Europe it is available.
If you remove the air tank do not try removing it alone. There is a screw on top left corner you cannot get to. You need to remove the whole bracket with pump and tank. It comes out easily, at least in the W221 it does. Four screws if I remember correctly.
