Tire Pressure Monitor Inoperative? Brand new car...
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Joined: Sep 2008
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2008 C300 Sport P1/AMG
Tire Pressure Monitor Inoperative? Brand new car...
I searched for about 15 minutes trying to find some info specific to the W204, but I didn't have any luck.
So, as I'm driving away from the dealership, I notice the tire pressure icon on the right side of the dash begins to flash and then stays on. A minute or two later, I get the message, "Tire Pressure Monitor Inactive." I've reactivated and reset the tire pressure data via the command center with no change in warning message. I've also performed a "factory reset" via the command center and nothing changed.
The car didn't have the 18" AMG wheels on it from the factory, and the dealer put the new wheels on for me. I'm thinking that the TPMS monitors on the new wheels didn't sync correctly when the old wheels were replaced. Is there a way to do a hard reset/re-initialization on the W204 that may fix this problem? Any other ideas??
So, as I'm driving away from the dealership, I notice the tire pressure icon on the right side of the dash begins to flash and then stays on. A minute or two later, I get the message, "Tire Pressure Monitor Inactive." I've reactivated and reset the tire pressure data via the command center with no change in warning message. I've also performed a "factory reset" via the command center and nothing changed.
The car didn't have the 18" AMG wheels on it from the factory, and the dealer put the new wheels on for me. I'm thinking that the TPMS monitors on the new wheels didn't sync correctly when the old wheels were replaced. Is there a way to do a hard reset/re-initialization on the W204 that may fix this problem? Any other ideas??
Member
Joined: May 2008
Posts: 107
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From: newport beach, ca
08 c300
Drive it for at least 15 miles.. If it doesnt go away then they didnt put the tpms in... When the tires are replaced with new ones u need to drive the car for at least 15 miles in order for the tpms to reactivated and sync with ur new wheels... Or u can check the tire valves and c if you see the tpms. If theres no metal surronding the valve stem and its just the valve then they didnt replace the tpms
Member
Joined: Aug 2007
Posts: 134
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From: Los Angeles
2008 C300 Sports, AMG 18 inch wheels, MM package, 6000K HID Kit, 20% 3M tinted all around
to find the correct psi for your tires, open the driver door, and look for the sticker on the side.
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MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,986
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From: SEATTLE WASHINGTON USA
'08 C300 Lux Barolo Red Beige Leather P2 MM 18" wheels '84 944
No TPMS
I searched for about 15 minutes trying to find some info specific to the W204, but I didn't have any luck.
So, as I'm driving away from the dealership, I notice the tire pressure icon on the right side of the dash begins to flash and then stays on. A minute or two later, I get the message, "Tire Pressure Monitor Inactive." I've reactivated and reset the tire pressure data via the command center with no change in warning message. I've also performed a "factory reset" via the command center and nothing changed.
The car didn't have the 18" AMG wheels on it from the factory, and the dealer put the new wheels on for me. I'm thinking that the TPMS monitors on the new wheels didn't sync correctly when the old wheels were replaced. Is there a way to do a hard reset/re-initialization on the W204 that may fix this problem? Any other ideas??
So, as I'm driving away from the dealership, I notice the tire pressure icon on the right side of the dash begins to flash and then stays on. A minute or two later, I get the message, "Tire Pressure Monitor Inactive." I've reactivated and reset the tire pressure data via the command center with no change in warning message. I've also performed a "factory reset" via the command center and nothing changed.
The car didn't have the 18" AMG wheels on it from the factory, and the dealer put the new wheels on for me. I'm thinking that the TPMS monitors on the new wheels didn't sync correctly when the old wheels were replaced. Is there a way to do a hard reset/re-initialization on the W204 that may fix this problem? Any other ideas??
When my dealer installed the 18" wheels before delivery, their tire machine sheered of one of the sensors which was then clunking around inside the wheel. When the damaged sensor was removed but temporarily not replaced, the warning light came on.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Thread Starter
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2008 C300 Sport P1/AMG
Thread Starter
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Joined: Sep 2008
Posts: 84
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2008 C300 Sport P1/AMG
Well, the "tire pressure monitor inoperative" notification has gone away. No amber tire warning on the tachometer either. I wonder if I should still take it in?
All I did was reset my garage door opening system and reprogram it... Next time the car was on, it went away...
All I did was reset my garage door opening system and reprogram it... Next time the car was on, it went away...
Junior Member
Joined: Apr 2008
Posts: 36
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From: Florida
2008 CLK63AMG cab., 2014 G550
I feel your pain, I have an '08 clk63 cab. and had it back to the dealer for that same issue 5 times. They eventually traced it back to an interference issue with the MB Bluetooth unit. According to the dealer, there was a service bulletin on the issue.
Well, the "tire pressure monitor inoperative" notification has gone away. No amber tire warning on the tachometer either. I wonder if I should still take it in?
All I did was reset my garage door opening system and reprogram it... Next time the car was on, it went away...
All I did was reset my garage door opening system and reprogram it... Next time the car was on, it went away...
MBWorld Fanatic!
Joined: Sep 2007
Posts: 1,481
Likes: 2
From: Southeast
2008 C300 Sport, RWD, US
Well, the "tire pressure monitor inoperative" notification has gone away. No amber tire warning on the tachometer either. I wonder if I should still take it in?
All I did was reset my garage door opening system and reprogram it... Next time the car was on, it went away...
All I did was reset my garage door opening system and reprogram it... Next time the car was on, it went away...
I've recently been reading up on how these TPMS sensors work. Apparantly, you not only have to torque the attaching nut to a certain specification, but also have to torque the very small valve thingy inside the valve stem. Two places where you can screw up causing damage.
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Joined: Jul 2002
Posts: 678
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From: Vancouver WA
'14 GLK250 Diesel
No, I think the clue is the garage door opener....sounds like there was some continuous interference that went away when he did the re-programming. Very interesting, if true...
And this whole episode [and the story on the Bluetooth interference] reinforces how much I really despise this approach to TPMS - burying active sensors in the wheels / valves is just a recipe for problems. The passive system that MB uses in all other worldwide markets makes much more sense to me - not as precise, but a WHOLE lot easier to live with. Canadians, consider yourselves lucky on this one....
And this whole episode [and the story on the Bluetooth interference] reinforces how much I really despise this approach to TPMS - burying active sensors in the wheels / valves is just a recipe for problems. The passive system that MB uses in all other worldwide markets makes much more sense to me - not as precise, but a WHOLE lot easier to live with. Canadians, consider yourselves lucky on this one....
Last edited by jrct9454; Oct 19, 2008 at 08:59 AM.
Junior Member
Joined: Feb 2011
Posts: 30
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2008 C350
"Tire Press. Monitor Inoperative" warning began appearing sporadically on my 2008 C-350 (after more than 40K miles with no problems). Dealer claimed there was a MB bulletin instructing them to replace a rear wiring harness. They did so, but the problem came back. Tomorrow they are going to replace the receiving unit, which I think is somewhere behind the dash. We'll see...
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Joined: Apr 2002
Posts: 22,058
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From: Diamond Bar, CA
W206 PHEV AMG
i just had the two front tires replaced and i'm pretty sure the sensor was working before hand since it gave me a low psi warning from a nail on the side. i'm pretty sure the sensor wasn't touched during the tire install. now the monitor inoperative is staying on. haven't got a chance to take it to the dealership yet, but i'm pretty sure one of the sensor became a dud.
the one tire that got the nail in it was left off the car until i got the tires for like 4-5 days. btw.
the one tire that got the nail in it was left off the car until i got the tires for like 4-5 days. btw.
Newbie
Joined: Jul 2011
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MB300 2008
TPMS inoperative
Had the same problem, all tires and sensors were fine. Dealer had to check computer sensor box and figure out that they had to move it couple of inches because interference with something else. After this I have never seen the message again.
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2008 C350
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'09 C350, P2, MM, Pano
I have this issue as well on my rear right tire but the dealer wants $200+ to replace it. The dealer told me I should get it fixed right away since it's moving around in there and could damage some parts. I think I heard some rattling from that area last night and I'm worried it's going to break something.
What do you guys think? Is there a cheaper way to get this fixed up? Can't believe this isn't covered under warranty...
What do you guys think? Is there a cheaper way to get this fixed up? Can't believe this isn't covered under warranty...
MBWorld Fanatic!
Joined: Nov 2007
Posts: 2,078
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From: NYC
2012 C300 4Matic
I have this issue as well on my rear right tire but the dealer wants $200+ to replace it. The dealer told me I should get it fixed right away since it's moving around in there and could damage some parts. I think I heard some rattling from that area last night and I'm worried it's going to break something.
What do you guys think? Is there a cheaper way to get this fixed up? Can't believe this isn't covered under warranty...
What do you guys think? Is there a cheaper way to get this fixed up? Can't believe this isn't covered under warranty...
Junior Member
Joined: Oct 2011
Posts: 54
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'09 C350, P2, MM, Pano
Wait, really? I have talked to others about this and they also said it was not covered. Do you have some documentation or something that I can use to prove that it's covered?
MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,986
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From: SEATTLE WASHINGTON USA
'08 C300 Lux Barolo Red Beige Leather P2 MM 18" wheels '84 944
I have this issue as well on my rear right tire but the dealer wants $200+ to replace it. The dealer told me I should get it fixed right away since it's moving around in there and could damage some parts. I think I heard some rattling from that area last night and I'm worried it's going to break something.
What do you guys think? Is there a cheaper way to get this fixed up? Can't believe this isn't covered under warranty...
What do you guys think? Is there a cheaper way to get this fixed up? Can't believe this isn't covered under warranty...
If so, the tire mounter broke the sensor off and it's loose inside the tire. This very thing happened to one of my wheels when I had the original tires changed before delivery. The dealer replaced it with no argument since they did it.
Junior Member
Joined: Oct 2011
Posts: 54
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'09 C350, P2, MM, Pano
You say you hear rattling. Do you mean a bump-bump sound when driving very slowly? Has that tire been dismounted lately?
If so, the tire mounter broke the sensor off and it's loose inside the tire. This very thing happened to one of my wheels when I had the original tires changed before delivery. The dealer replaced it with no argument since they did it.
If so, the tire mounter broke the sensor off and it's loose inside the tire. This very thing happened to one of my wheels when I had the original tires changed before delivery. The dealer replaced it with no argument since they did it.
Can anyone verify that this SHOULD be covered under warranty?
