Tire pressure control
Thread Starter
Junior Member
Joined: Apr 2009
Posts: 25
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From: Moscow, Russia
E500 AMG (U.S. version)
Tire pressure control
All,
I have E500 MY05 equipped by the tire pressure control which displays the actual figures on the dashboard and just faced with the problem: I checked the pressure in all tyres with the air-gauge in-build in the tire compressor, checked it again by the separate air-gauge - everything was all right. While re-activating the pressure control system I noticed that the pressure in the front right tire in slightly higher than in the left right (about 2-3 Psi). I decided to activate the system, pressed "R"-button and began to drive. After 15-20 min of driving I've got a red mesage on the seedo said that F.R. tyre was low, however the displayed figures said that the F.L. and F.R. tyres now had the same pressure.
Looks like the F.R. tyre got low. I checked the pressure by the independent air-gauge - everithing was fine. This persisted several times.
Does anybody faced with the same mystic issue?
Thank you
I have E500 MY05 equipped by the tire pressure control which displays the actual figures on the dashboard and just faced with the problem: I checked the pressure in all tyres with the air-gauge in-build in the tire compressor, checked it again by the separate air-gauge - everything was all right. While re-activating the pressure control system I noticed that the pressure in the front right tire in slightly higher than in the left right (about 2-3 Psi). I decided to activate the system, pressed "R"-button and began to drive. After 15-20 min of driving I've got a red mesage on the seedo said that F.R. tyre was low, however the displayed figures said that the F.L. and F.R. tyres now had the same pressure.
Looks like the F.R. tyre got low. I checked the pressure by the independent air-gauge - everithing was fine. This persisted several times.
Does anybody faced with the same mystic issue?
Thank you
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You only mention relative figures, what is the absolute pressure on your tyres? The system would give a warning even if all tyres had the same pressure if the absolute pressure was too low. This fixed limit may appear a bit differently for each sensor.
I assume you had sufficient pressure and the issue is something else but you could confirm this first.
I assume you had sufficient pressure and the issue is something else but you could confirm this first.
Thread Starter
Junior Member
Joined: Apr 2009
Posts: 25
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From: Moscow, Russia
E500 AMG (U.S. version)
You only mention relative figures, what is the absolute pressure on your tyres? The system would give a warning even if all tyres had the same pressure if the absolute pressure was too low. This fixed limit may appear a bit differently for each sensor.
I assume you had sufficient pressure and the issue is something else but you could confirm this first.
I assume you had sufficient pressure and the issue is something else but you could confirm this first.
Thread Starter
Junior Member
Joined: Apr 2009
Posts: 25
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From: Moscow, Russia
E500 AMG (U.S. version)
Out Of Control!!
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From: North Scottsdale, AZ
'71 Pinto
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Thread Starter
Junior Member
Joined: Apr 2009
Posts: 25
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From: Moscow, Russia
E500 AMG (U.S. version)
Approached the office and let the car stay for 4-5 hours. Start the engine - displayed 2.3 for F.L. and 2.5 for F.R. Decided to blow off F.R. - while separate air-gauge showed 0,2 atm in-build showed 2,5 atm. Had the F.R. tyre blown up to 3 atm by separate air-gauge - in-built displayed 2,5
I could understand if this would caused by a sensor problem and the system displayed the it is inoperative (like when I use the wintertyres mounted to the wheels without sensors), but now it looks like the system works, but the sensor transfers the wrong data.
I do not have a clue how the sensor works - maybe it can be somehow cleaned?
Thanks
Last edited by Oleg_850; Aug 20, 2009 at 09:50 AM.
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MBWorld Fanatic!
Joined: Dec 2006
Posts: 6,501
Likes: 336
From: Europe
223.168 & 213.012 & 906.633 & 214.005
Today experienced the same issue as in the past. While started the display showed 2,3 atm for F.L. and 2.5 for F.R. After 10-15 driving got a red desplay said the F.R. has inssuffecient pressure, while the display showed 2,3 atm for both fornt tyres.
Approached the office and let the car stay for 4-5 hours. Start the engine - displayed 2.3 for F.L. and 2.5 for F.R. Decided to blow off F.R. - while separate air-gauge showed 0,2 atm in-build showed 2,5 atm. Had the F.R. tyre blown up to 3 atm by separate air-gauge - in-built displayed 2,5
I could understand if this would caused by a sensor problem and the system displayed the it is inoperative (like when I use the wintertyres mounted to the wheels without sensors), but now it looks like the system works, but the sensor transfers the wrong data.
I do not have a clue how the sensor works - maybe it can be somehow cleaned?
Thanks
Approached the office and let the car stay for 4-5 hours. Start the engine - displayed 2.3 for F.L. and 2.5 for F.R. Decided to blow off F.R. - while separate air-gauge showed 0,2 atm in-build showed 2,5 atm. Had the F.R. tyre blown up to 3 atm by separate air-gauge - in-built displayed 2,5
I could understand if this would caused by a sensor problem and the system displayed the it is inoperative (like when I use the wintertyres mounted to the wheels without sensors), but now it looks like the system works, but the sensor transfers the wrong data.
I do not have a clue how the sensor works - maybe it can be somehow cleaned?
Thanks
But why did you not swap the front tyres as suggested? Since the issue is not always present, it would be difficult for a workshop to diagnose. But if you can tell the issue following the wheel from the right side to the left, then it is obvious where the error is.
Thread Starter
Junior Member
Joined: Apr 2009
Posts: 25
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From: Moscow, Russia
E500 AMG (U.S. version)
The tyre sensors are inside the tyre, there is no need to clean them and it would not be possible either (without removing the tyre).
But why did you not swap the front tyres as suggested? Since the issue is not always present, it would be difficult for a workshop to diagnose. But if you can tell the issue following the wheel from the right side to the left, then it is obvious where the error is.
But why did you not swap the front tyres as suggested? Since the issue is not always present, it would be difficult for a workshop to diagnose. But if you can tell the issue following the wheel from the right side to the left, then it is obvious where the error is.
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,636
From: North Scottsdale, AZ
'71 Pinto
Note sensor battery is not replaceable. To clear DTC (diagnostic trouble code) reactivate the system – trip odometer reset button while viewing current inflation pressures for each tire in display.
Thread Starter
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Joined: Apr 2009
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From: Moscow, Russia
E500 AMG (U.S. version)
