MBWorld.org Forums

S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

TPMS QUESTION

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Jun 18, 2020 | 11:55 AM
Share
  #1  
ChuckinTucson's Avatar
ChuckinTucson
Thread Starter
Senior Member
15 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2008
Posts: 477
Likes: 30
From: Maricopa, AZ
2012 S63, 2013 E350 Bluetec
TPMS QUESTION
I have a 2012 S63. The low tire pressure warning symbol is on the dash, but when I scroll over to check the actual tire pressure, it shows 37/37 front and 38/38 rear and the numbers are all in white (meaning they're fine). Anyone have an idea of why the symbol is still on even though the tire pressure is okay?
Reply
0
Old Jun 18, 2020 | 03:29 PM
Share
  #2  
kenstudios's Avatar
kenstudios
Super Member
 
Joined: Aug 2005
Posts: 987
Likes: 5
Originally Posted by ChuckinTucson
I have a 2012 S63. The low tire pressure warning symbol is on the dash, but when I scroll over to check the actual tire pressure, it shows 37/37 front and 38/38 rear and the numbers are all in white (meaning they're fine). Anyone have an idea of why the symbol is still on even though the tire pressure is okay?
Try reset. Press arrow down to reset then ok. If reset doesn't work then it might be a bad sensor
Reply
1
Old Jun 18, 2020 | 05:17 PM
Share
  #3  
COUPCONNOISSEUR's Avatar
COUPCONNOISSEUR
Senior Member
10 Year Member
Photogenic
Liked
Loved
 
Joined: Dec 2013
Posts: 314
Likes: 35
From: New York
2010 CL550
Originally Posted by kenstudios
Try reset. Press arrow down to reset then ok. If reset doesn't work then it might be a bad sensor
is it possible one or more batteries could be going bad??
Reply
0
Old Jun 19, 2020 | 01:09 AM
Share
  #4  
The Thomas J's Avatar
The Thomas J
Super Member
10 Year Member
Photogenic
Liked
Community Favorite
 
Joined: Jun 2013
Posts: 804
Likes: 74
From: Staten Island, NY
2010 MB S550, 2017 MB SLC 300
Yes.
It's also recommended to use plastic covers on the air valves. Metal covers shorten the sensor's life.
Reply
0
Old Jun 21, 2020 | 06:43 PM
Share
  #5  
ChuckinTucson's Avatar
ChuckinTucson
Thread Starter
Senior Member
15 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2008
Posts: 477
Likes: 30
From: Maricopa, AZ
2012 S63, 2013 E350 Bluetec
Originally Posted by COUPCONNOISSEUR
is it possible one or more batteries could be going bad??
Good suggestion, but they're both fairly new. The aux is less than a month old.
Reply
0
Old Jun 22, 2020 | 09:41 AM
Share
  #6  
DaleB's Avatar
DaleB
Super Member
Veteran: Army
 
Joined: May 2019
Posts: 671
Likes: 288
From: Omaha, NE
2007 S600
Have you checked the pressure in the spare?
Reply
0
Old Aug 9, 2020 | 07:47 PM
Share
  #7  
rmetzner49's Avatar
rmetzner49
Junior Member
 
Joined: Sep 2016
Posts: 68
Likes: 3
From: Clearwater, FL
2009 CLK350 Cabriolet with 18" AMG Fitment TSW Rims
TPMS
@TheThomasJ
Yes.
It's also recommended to use plastic covers on the air valves. Metal covers shorten the sensor's life.
Is that to suggest the transmit antenna lives in the stem? Otherwise that doesn't pass the sniff test. Can you point to a link that confirms your theory?

Bob M.
Reply
0

Trending Topics

Old Aug 9, 2020 | 07:58 PM
Share
  #8  
whoover's Avatar
whoover
MBWorld Fanatic!
20 Year Member
Photogenic
Liked
 
Joined: Mar 2006
Posts: 4,278
Likes: 377
From: San Jose area
'19 E63S sedan
Originally Posted by rmetzner49
@TheThomasJ

Is that to suggest the transmit antenna lives in the stem? Otherwise that doesn't pass the sniff test. Can you point to a link that confirms your theory?

Bob M.
TPMS stems are metal. A metal cap sets up galvanic action that can cause bimetallic corrosion and damage the valve. The current produced is small but it can also interfere with the sensor. This is why TPMS stems never come with metal caps and their use is strongly discouraged. You might get away with it in California, but an area that uses salt in the winter will cause the stems to corrode very quickly if they're capped with a different metal.

https://www.autoserviceprofessional....-compatibility
Last edited by whoover; Aug 9, 2020 at 08:00 PM.
Reply
0
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old Aug 10, 2020 | 10:03 AM
Share
  #9  
BOTUS's Avatar
BOTUS
MBWorld Fanatic!
10 Year Member
Community Builder
Community Influencer
Liked
 
Joined: Aug 2014
Posts: 5,319
Likes: 1,675
S500
if the desired pressure setting (was manually set) very high and you are now a long way from it you'll get a warning....

level them up and press reset

mine doesn't have one on the spare
Reply
0
Old Aug 12, 2020 | 01:10 AM
Share
  #10  
The Thomas J's Avatar
The Thomas J
Super Member
10 Year Member
Photogenic
Liked
Community Favorite
 
Joined: Jun 2013
Posts: 804
Likes: 74
From: Staten Island, NY
2010 MB S550, 2017 MB SLC 300
Originally Posted by whoover
TPMS stems are metal. A metal cap sets up galvanic action that can cause bimetallic corrosion and damage the valve. The current produced is small but it can also interfere with the sensor. This is why TPMS stems never come with metal caps and their use is strongly discouraged. You might get away with it in California, but an area that uses salt in the winter will cause the stems to corrode very quickly if they're capped with a different metal.

https://www.autoserviceprofessional....-compatibility
Yes, that's exactly why. I learned the hard way on my former Toyota 4runner that had metal caps on the valve stems. Thank you for answering and saving me the time of doing so. I run chrome wheels in the summer and use matching chrome caps on the valve stem. In the winter, I switch to alloy wheels and use plastic caps.
Reply
0
Old Aug 12, 2020 | 01:09 PM
Share
  #11  
lkchris's Avatar
lkchris
MBWorld Fanatic!
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2005
Posts: 6,189
Likes: 242
From: Albuquerque
'10 CL550, '12 GL550
Originally Posted by rmetzner49
@TheThomasJ

Is that to suggest the transmit antenna lives in the stem? Otherwise that doesn't pass the sniff test. Can you point to a link that confirms your theory?

Bob M.
oh yes, and the valve cores are nickel rather than the previous brass to avoid corrosion. Don’t replace them with pep boys junk.
Reply
0
Back to Subforum
S-Class (W221)
View Next Unread
ESP blinking. Jolt when pulling away.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes, average.
Show Printable Version
Email this Page

Advanced Search

All times are GMT -4. The time now is 01:41 AM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE