Tire Pressure Monitor
Member
Joined: Jan 2007
Posts: 75
Likes: 0
From: NW Chiburb
04 E500
If the sensors worked OK with your old wheels it seems unlikely that it would be necessary to buy new ones. How did you determine that the sensors are leaking? Did you submerge the wheels or spray them with soapy water and see bubbles from that area?
Go to Post #19 above and click on the link. Pages 10 and 11 show the sensor and valve components. The sensors themselves are epoxy-filled, so they will not leak. There are only two places where you might be losing air. One is at the gasket at the bottom of the Valve ( Page 11 Item 2, sometimes referred to as the valve stem). That would cause bubbles to appear outside the Valve stem at the bottom. The other is the Schrader valve inside it. That would cause the bubbles to appear inside at the top.
Seems like at worst you might need new Valve stems, not new sensors. If you're showing leaks at the bottom of the stem, it may be that the lock nuts just weren't tightened enough. I'd try checking that first.
Go to Post #19 above and click on the link. Pages 10 and 11 show the sensor and valve components. The sensors themselves are epoxy-filled, so they will not leak. There are only two places where you might be losing air. One is at the gasket at the bottom of the Valve ( Page 11 Item 2, sometimes referred to as the valve stem). That would cause bubbles to appear outside the Valve stem at the bottom. The other is the Schrader valve inside it. That would cause the bubbles to appear inside at the top.
Seems like at worst you might need new Valve stems, not new sensors. If you're showing leaks at the bottom of the stem, it may be that the lock nuts just weren't tightened enough. I'd try checking that first.
Junior Member
Joined: Jun 2005
Posts: 27
Likes: 0
From: Oviedo, Spain
CL500 2003
If the sensors worked OK with your old wheels it seems unlikely that it would be necessary to buy new ones. How did you determine that the sensors are leaking? Did you submerge the wheels or spray them with soapy water and see bubbles from that area?
Go to Post #19 above and click on the link. Pages 10 and 11 show the sensor and valve components. The sensors themselves are epoxy-filled, so they will not leak. There are only two places where you might be losing air. One is at the gasket at the bottom of the Valve ( Page 11 Item 2, sometimes referred to as the valve stem). That would cause bubbles to appear outside the Valve stem at the bottom. The other is the Schrader valve inside it. That would cause the bubbles to appear inside at the top.
Seems like at worst you might need new Valve stems, not new sensors. If you're showing leaks at the bottom of the stem, it may be that the lock nuts just weren't tightened enough. I'd try checking that first.
Go to Post #19 above and click on the link. Pages 10 and 11 show the sensor and valve components. The sensors themselves are epoxy-filled, so they will not leak. There are only two places where you might be losing air. One is at the gasket at the bottom of the Valve ( Page 11 Item 2, sometimes referred to as the valve stem). That would cause bubbles to appear outside the Valve stem at the bottom. The other is the Schrader valve inside it. That would cause the bubbles to appear inside at the top.
Seems like at worst you might need new Valve stems, not new sensors. If you're showing leaks at the bottom of the stem, it may be that the lock nuts just weren't tightened enough. I'd try checking that first.
Thanks for reply. I have determinate that sensors are loosing air because before installing it not leaking. I´ll check these points that you have mentioned. Thx!!
Last edited by valiance; Apr 25, 2010 at 06:23 PM.
Junior Member
Joined: Dec 2009
Posts: 36
Likes: 0
2004 E500
For those who haven't seen it, there is some training material for the system at http://www.mercedestechstore.com/pdfs/W211_technician/319%20HO%20TPC%20(GC_RP)%2006-20-02.pdf
I think it will answer most of the questions, except for the ones about costs.
I think it will answer most of the questions, except for the ones about costs.
When using wheels without pressure sensors, deactivate TPC using DAS (“control
unit adaptations” > “read coding and change if necessary” > “monitoring function” >
F2 > select “not active”, then “transfer coding into control unit”.)
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Super Member
Joined: Nov 2008
Posts: 620
Likes: 16
CLS500 M113
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