Lumbar losing air, controller turning off, '09 S550
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 28
Likes: 12
From: Dallas, Texas
sl600
Lumbar losing air, controller turning off, '09 S550
For about 6 months, my lumbar support on the driver's seat will randomly lose its air, thus the controller thinks there is a leak, and therefore turns off the compressor until car is completely turned off.
Things I've done and observed:
First, I researched this forum and found a little discussion which was helpful. Next, I swapped the driver's and passenger's control modules which didn't change anything.
If i give a low lumbar number setting, such 4 or less, the pressure will lose itself more often than if I have a lumbar setting of six or more. This makes me think it is a valve issue with a higher pressure holding valve closed??
Where is the air comporessor for the seat? I have the back off, but can't find it.
I see three lumbar rectangular/flat devices on the right hand side of the lumbar area, each with wires going to them - are these the only valves for lumbar?
Is there a valve somewhere else between compressor and lumbar rectangular devices?
On mbonline, I see there is a part number 221-800-01-78 called valve for $140.25?
Thoughts?
Things I've done and observed:
First, I researched this forum and found a little discussion which was helpful. Next, I swapped the driver's and passenger's control modules which didn't change anything.
If i give a low lumbar number setting, such 4 or less, the pressure will lose itself more often than if I have a lumbar setting of six or more. This makes me think it is a valve issue with a higher pressure holding valve closed??
Where is the air comporessor for the seat? I have the back off, but can't find it.
I see three lumbar rectangular/flat devices on the right hand side of the lumbar area, each with wires going to them - are these the only valves for lumbar?
Is there a valve somewhere else between compressor and lumbar rectangular devices?
On mbonline, I see there is a part number 221-800-01-78 called valve for $140.25?
Thoughts?
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 28
Likes: 12
From: Dallas, Texas
sl600
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,630
From: North Scottsdale, AZ
'71 Pinto
Check pneumatic lines for leaks and kinks.
If found to be bladder replacement part is 2219102275 (505 in diagram) pictured here: https://www.ecstuning.com/b-genuine-...er/2219102275/ 2218000178 (530) is not applicable to your VIN see attachments.
Possible DIY bladder repair: https://mbworld.org/forums/s-class-w...-puncture.html
Pump: http://workshop-manuals.com/mercedes...on/page_19152/ see attachment for panel removal.
If found to be bladder replacement part is 2219102275 (505 in diagram) pictured here: https://www.ecstuning.com/b-genuine-...er/2219102275/ 2218000178 (530) is not applicable to your VIN see attachments.
Possible DIY bladder repair: https://mbworld.org/forums/s-class-w...-puncture.html
Pump: http://workshop-manuals.com/mercedes...on/page_19152/ see attachment for panel removal.
Last edited by konigstiger; Jul 3, 2017 at 03:55 PM.
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 28
Likes: 12
From: Dallas, Texas
sl600
Wow! Thanks for help, have more questions please.
You guys are great! What a resource!
My car has about 70,000 miles and everything looked tip top behind the seat cover. No kinks, no loose connections.
So there's only one pump, and it's in the trunk.
Does the part number below, the dynamic seat air bladder assembly,
2219102275
have valves which is what is electrically connected on the assembly?
Are these the ONLY valves controlling lumbar, therefore I should order a new bladder assembly? When lumbar fails, the other bladders can still be adjusted.
Many thanks!
My car has about 70,000 miles and everything looked tip top behind the seat cover. No kinks, no loose connections.
So there's only one pump, and it's in the trunk.
Does the part number below, the dynamic seat air bladder assembly,
2219102275
have valves which is what is electrically connected on the assembly?
Are these the ONLY valves controlling lumbar, therefore I should order a new bladder assembly? When lumbar fails, the other bladders can still be adjusted.
Many thanks!
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,630
From: North Scottsdale, AZ
'71 Pinto
Most common malfunction, bladder failure. As shown in ECS link above, seat adapter incorporates valves, etc. Definitive diagnose before replacing part(s), have someone check for fault codes using MB DAS.
Trending Topics
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,630
From: North Scottsdale, AZ
'71 Pinto
Bladders are inflated/regulated by a control module and air distribution center called a module carrier (adapter) = part # 2219102275 referenced in above post. Read bulletin here: http://workshop-manuals.com/mercedes...oesnt_inflate/ + next pages.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 28
Likes: 12
From: Dallas, Texas
sl600
DTC and more
Thank you! So the manual is suggesting replacing the module carrier. Is there a place to order the module carrier that supports this forum?
next, can I purchase a DTC code reader that is very thorough for my car?
next, can I purchase a DTC code reader that is very thorough for my car?
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 28
Likes: 12
From: Dallas, Texas
sl600
Lumbar update success
It has been almost a week since I installed the new dynamic lumbar air bladder system and all is working properly!
Many thanks again to all!
Im very impressed with the Mercedes quality of workmanship. Every part in the seat has a p/n label and everything is designed to be taken apart or removed. Very nice!
It did take a few hours work, but I was exploring carefully and gently as I realized what had to be removed to get to the air bladder system.
Many thanks again to all!
Im very impressed with the Mercedes quality of workmanship. Every part in the seat has a p/n label and everything is designed to be taken apart or removed. Very nice!
It did take a few hours work, but I was exploring carefully and gently as I realized what had to be removed to get to the air bladder system.
MBWorld Fanatic!
Joined: Jun 2013
Posts: 1,900
Likes: 210
From: Sacramento , CA
2010 e550 p2
It has been almost a week since I installed the new dynamic lumbar air bladder system and all is working properly!
Many thanks again to all!
Im very impressed with the Mercedes quality of workmanship. Every part in the seat has a p/n label and everything is designed to be taken apart or removed. Very nice!
It did take a few hours work, but I was exploring carefully and gently as I realized what had to be removed to get to the air bladder system.
Many thanks again to all!
Im very impressed with the Mercedes quality of workmanship. Every part in the seat has a p/n label and everything is designed to be taken apart or removed. Very nice!
It did take a few hours work, but I was exploring carefully and gently as I realized what had to be removed to get to the air bladder system.
im trying to do the same.... my left bladder making that hissing air sound when compressor pumps air to it...
not a complicated job ?
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 28
Likes: 12
From: Dallas, Texas
sl600
Easy job?
I thought was easy enough because everything is designed to come Apart.
Seat out is easiest so you can work all around it.
im in Dallas, you?
my old unit has good bags if you want to purchase my old unit. My guess is one of the lumbar controllers failed, but my bladders are good.
pm me if interested
Seat out is easiest so you can work all around it.
im in Dallas, you?
my old unit has good bags if you want to purchase my old unit. My guess is one of the lumbar controllers failed, but my bladders are good.
pm me if interested
