Tire Pressure Monitor Systems
Searching the threads, I saw some mention that a COMAND program change can activate an option that uses EPS to detect a low pressure situation. Is that a real option for my E 2006?
http://autoaccessconnect.stores.yaho...irprinvas.html

Indicator monitors the tire inflation pressure by evaluating each wheel’s rotational speed. This allows the system to detect a significant loss of pressure in a tire. If a wheel’s rotational speed changes due to falling tire inflation pressure, you will see a corresponding warning message in the multifunction display.
Standard in MY06 CLS therefore as suggested see if the dealer can, will activate the system through SDS.
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The on-line Euro manual explains this for a W211.
You have to activate the system after any change on tyres, including tyre pressure changes. Operated from the instrument cluster.
Last edited by Diesel Benz; Aug 9, 2009 at 09:29 AM.


I guess those Ford tyres (was it a Ford SUV?) are not exploding any more, perhaps they have reconsidered the whole issue.

The Basic (Works with the ABS speed sensors)TPS can be version coded with the SDS aka Star on 06 and later cars.Or One can install the Complete TPS system with sensors in each wheel,Wire harness,control unit.
I checked the pressures and had one tire that was only about a pound lower than the other side. I carefully inflated all the tires and then reset the monitoring system. The message went away.
Check your late cars to see if the stems have a plastic cap instead of a metal cap. If so, the stem probably has a sensor on the end to transmit the pressure. On US cars this will only give a warning. On Canadian cars, it will tell you actual pressures.

I checked the pressures and had one tire that was only about a pound lower than the other side. I carefully inflated all the tires and then reset the monitoring system. The message went away.
Check your late cars to see if the stems have a plastic cap instead of a metal cap. If so, the stem probably has a sensor on the end to transmit the pressure. On US cars this will only give a warning. On Canadian cars, it will tell you actual pressures.
There are only two options, as far as I am aware of, and I believe that is what Mark Cummings explained. If the car does not show tyre pressure readings at the instrument cluster, it would not have any wheel sensors. It would only have the tyre pressure warning system that works with ABS sensors.
Is your opinion different?
I can't prove any of this but I doubt that a system tied to tire rotation would have caught the very small pressure difference I had when I was getting the warning (consistently). In fact, all I did was add one pound of pressure to one front tire and then checked the pressures with a good gauge. It appeared that the pressures were the same after the change so I reset the system and the warning went away. What was confusing was that the warning appeared when we would come to a stop and just as we were shutting the engine off (w/Keyless Go). The warning stayed there until I opened the door which shuts things down on my car.
Note that I had already tried resetting the system BEFORE changing the tire pressure and that didn't resolve the problem.
Bud

I can't prove any of this but I doubt that a system tied to tire rotation would have caught the very small pressure difference I had when I was getting the warning (consistently). In fact, all I did was add one pound of pressure to one front tire and then checked the pressures with a good gauge. It appeared that the pressures were the same after the change so I reset the system and the warning went away. What was confusing was that the warning appeared when we would come to a stop and just as we were shutting the engine off (w/Keyless Go). The warning stayed there until I opened the door which shuts things down on my car.
Note that I had already tried resetting the system BEFORE changing the tire pressure and that didn't resolve the problem.
Bud
Considering the malfunction indication, I don't have too much experience, lucky me but I believe the car informs about a malfunction that has happened during driving, at switch off, even if the issue was fixed meanwhile.
In any case, both systems would need to be initialised after tyres have been changed or tyre pressures have been changed. It may help to inflate tyres to the reading they had when RDW/RDK was previously initialised but it would be difficult to reach the exact same reading (although the system would allow some tolerances).
If you had one tyre with low pressure while trying to initiase the system, it may have detected a too large difference between wheels and did not adapt actually. Just a guess.
They seem to be small, light and unobtrusive. I hope so.
http://www.avanigroup.com/air-alert-valve-caps.html


tire pressures. MB just doesn’t seem to want to add ANYTHING
electronically that they absolutely don’t have to!
By the way, are the tires on the 08 350 Sport “Run-flats?”
jimm
==========
‘08 E350 Sport, P2, Black/black, Parktronic,
Voice, Bluetooth, Burl Walnut, Split rear seat,
Wood/leather steering wheel
Last edited by jimm; Nov 1, 2007 at 08:41 AM.





