Tire Pressure Monitors
Thread Starter
Senior Member
Joined: Feb 2025
Posts: 262
Likes: 87
From: Seattle
Currently ‘2015 S550 4matic. Previously 03 E320, ‘06 S430, ‘08 S550 4matic
Tire Pressure Monitors
‘15 550 with what I assume are factory TPM’s. I used a digital pressure gauge to set cold tire pressure at 38 lbs. Three wheels read spot on at 38 and increase with tire temperature. The fourth sensor reads 40 lbs from the get go and increases from there.
Obviously not a big deal in the big picture of life, but I am interested in members’ thoughts on these things.
I understand that their batteries supposedly last up to 7-10 years.
Has anyone ever replaced them?
If so, what do dependable and accurate monitors cost?
Be well everyone..
Chuck
Obviously not a big deal in the big picture of life, but I am interested in members’ thoughts on these things.
I understand that their batteries supposedly last up to 7-10 years.
Has anyone ever replaced them?
If so, what do dependable and accurate monitors cost?
Be well everyone..
Chuck
Last edited by SSBN629 Seattle; Oct 11, 2025 at 12:51 PM.
Thread Starter
Senior Member
Joined: Feb 2025
Posts: 262
Likes: 87
From: Seattle
Currently ‘2015 S550 4matic. Previously 03 E320, ‘06 S430, ‘08 S550 4matic
MBWorld Fanatic!
Joined: Aug 2007
Posts: 1,823
Likes: 792
From: Pacific Northwest
2001 S600 V12 Sold, 2011 Jaguar XFR Sold, 2017 S550 4-Matic, 2018 S63 AMG Sedan
No way to to replace the batteries, just have to buy new sensors. Not expenseive nowadays. I remember when MB TPMS sensors were a couple hundred dollars each.
MBWorld Fanatic!
Joined: Aug 2017
Posts: 1,695
Likes: 521
2019 S560, 2015 Honda Civic Hybrid
Oddly enough, I've never had to replace a TPMS sensor on any of my cars, and I usually keep them till ripe old age ;-)
My wife's Honda uses 'indirect' pressure monitoring; the computer monitors rotational speed of each wheel and if a variance develops it attributes it to tire pressure and throws a warning light. The trade off is anytime I add air to the tires I have to do "learn" mode so the computer knows the new correct speed to monitor for.
My wife's Honda uses 'indirect' pressure monitoring; the computer monitors rotational speed of each wheel and if a variance develops it attributes it to tire pressure and throws a warning light. The trade off is anytime I add air to the tires I have to do "learn" mode so the computer knows the new correct speed to monitor for.
Trending Topics
Super Member
Joined: Mar 2019
Posts: 573
Likes: 179
From: Half Moon Bay, CA
2016 S550e, 2005 Nissan Xterra 4x4, 1984 300ZX
I had to replace my 20 year old ones on a Nissan, did it with new tires. Agreed just do it when you replace the tires, easier and less labor to deal with in the long run.
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
MBWorld Fanatic!
Joined: Oct 2019
Posts: 5,152
Likes: 1,766
From: Colorado
G550
One of the sensors on my '16 Jeep JK has begun acting up, reporting low pressure when the tire inflation is yet OK -- right on schedule at almost 10 years. Likely the rest will soon follow. Plan to ignore until I buy new tires next Spring.
