Low tire pressure warning
10-15-2010, 11:11 AM
#1
MBWorld Fanatic!
Thread Starter
Low tire pressure warning
So temperatures fell a bit and it's been raining. Just like a year ago during this time tire pressure system starts giving warnings.
Last year that happend a coulpe of times, but the only warning was on MFD saying check tire pressure.
Yesterday I started driving (cold and rainy) and MFD turned red and the yellow sing came on as well (i thought i got flat tire or something). Haven't check pressure yet, but tires seemed fine (no flats). Wondering if amount of tire pressure loss makes warning different. I wish I had new system that tells you actuall tire pressure in each tire (I think later 2010 models have it).
Last year that happend a coulpe of times, but the only warning was on MFD saying check tire pressure.
Yesterday I started driving (cold and rainy) and MFD turned red and the yellow sing came on as well (i thought i got flat tire or something). Haven't check pressure yet, but tires seemed fine (no flats). Wondering if amount of tire pressure loss makes warning different. I wish I had new system that tells you actuall tire pressure in each tire (I think later 2010 models have it).
10-15-2010, 11:41 AM
#2
Member
Join Date: Mar 2009
Posts: 102
Likes: 0
Received 0 Likes
on
0 Posts
GLK 350 AWD Steel Grey/Black Interior (3/18/09); E63AMG (5/5/2011)
Yep this year I only had the check tire pressure warning. May be due to the temp drop as you said. Had to top it off and I haven't seen anything pop up lately.
Last year I got the whole panel turning red with chime as I was driving ... turns out I had a puncture in my tire which caused the tire to lose like 10psi within a few days. It could be related to the actual pressure difference but couldn't find anything in the manual.
Last year I got the whole panel turning red with chime as I was driving ... turns out I had a puncture in my tire which caused the tire to lose like 10psi within a few days. It could be related to the actual pressure difference but couldn't find anything in the manual.
10-15-2010, 12:57 PM
#3
Administrator
So temperatures fell a bit and it's been raining. Just like a year ago during this time tire pressure system starts giving warnings.
Last year that happend a coulpe of times, but the only warning was on MFD saying check tire pressure.
Yesterday I started driving (cold and rainy) and MFD turned red and the yellow sing came on as well (i thought i got flat tire or something). Haven't check pressure yet, but tires seemed fine (no flats). Wondering if amount of tire pressure loss makes warning different. I wish I had new system that tells you actuall tire pressure in each tire (I think later 2010 models have it).
Last year that happend a coulpe of times, but the only warning was on MFD saying check tire pressure.
Yesterday I started driving (cold and rainy) and MFD turned red and the yellow sing came on as well (i thought i got flat tire or something). Haven't check pressure yet, but tires seemed fine (no flats). Wondering if amount of tire pressure loss makes warning different. I wish I had new system that tells you actuall tire pressure in each tire (I think later 2010 models have it).
10-15-2010, 10:48 PM
#6
Member
Join Date: Jan 2009
Location: Ottawa, Ontario, Canada
Posts: 102
Likes: 0
Received 0 Likes
on
0 Posts
2010 GLK
TPMS
You Americans got the good TPMS because NHTSA mandated tire pressure monitoring for the TREAD Act.
USA = direct measure at the valve stem giving actual psi / bar
Canada = indirect measure we got the cheap tire rotation "estimate" via the ABS sensor. I tested mine and had to drop the tire pressure around 20 psi to get the dash warning light on...
Notes from an engineer's diary
USA = direct measure at the valve stem giving actual psi / bar
Canada = indirect measure we got the cheap tire rotation "estimate" via the ABS sensor. I tested mine and had to drop the tire pressure around 20 psi to get the dash warning light on...
Notes from an engineer's diary
10-16-2010, 11:14 AM
#7
Member
Join Date: Dec 2009
Location: Canada
Posts: 118
Likes: 0
Received 2 Likes
on
2 Posts
Me, 2008 Hummer H2 Wife, 2010 Mercedes GLK350
One way around this is to bring the tire pressure up a bit higher, than when it gets cold and the pressure goes down, the warning doesn't come on.
Trending Topics
10-23-2010, 10:01 AM
#10
MBWorld Fanatic!
Thread Starter
... only kidding! What do you do there?
Last edited by NYCGLK; 10-23-2010 at 11:51 AM.
10-23-2010, 10:33 AM
#11
Super Member
Join Date: Apr 2010
Location: Tromsø, 69° 41' N
Posts: 520
Likes: 0
Received 5 Likes
on
2 Posts
2010 GLK 220CDI 4M BlueEFFICIENCY
An APA note:
"It’s important to adjust tire pressure in the autumn, because the drop in temperature causes the air pressure in tires to go down significantly: tire pressure is reduced by 1.7 PSI (0.12 bar) for every drop of 10°C in temperature."
