Run Flat Indicator - Page 2 - Mercedes-Benz Forum
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#11 (permalink) Old 12-09-2011, 01:10 PM
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When I threw my snows on this year, it threw the same red flag at me. First time that I've had to do the reset after changing wheels....My tires were a few pounds off....

For a basic system,...it still works well...
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#12 (permalink) Old 12-09-2011, 01:27 PM
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Originally Posted by pfsantos View Post
Make sure that the key is in position 2 more in the ignition lock.

Press and hold the (menu up) or (menu down) button on the multifunction steering wheel until the standard display appears in the multifunction display more.

Press the (arrow up) or arrow down) button until the Run Flat Indicator Menu: press R-button message appears in the multifunction display.

Press the reset button on the instrument cluster.

The Restart Run Flat Indicat.? message appears in the multifunction display.

If you wish to confirm the restart:
Press the (+) button on right side of steering wheel
.

The Run Flat Indicator restarted message appears in the multifunction display.

After a teach-in period, the tyre pressure loss warning system will monitor the set tyre pressures of all four tyres.

See:

Interactive Owner's Manual [245]

Go to tyres and wheels, then tire pressure, then scroll down.
Got ur done!

Thanks Paul
I'll let you know if I get the warning again.
apparently we can get a tire warning because of a slippery road...
I really don't have a lot of options on the instrument cluster under (vehicle )I only have automatic door lock.
(lighting) I have a delay setting (int.light delay)
I don't see compass..anywhere!
in the #6 menu position (distance 206km). guess it means 206km to empty?

Ron
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#13 (permalink) Old 12-09-2011, 01:38 PM
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Cool.

From what I understand (either from the o/m or I picked it up somewhere else), the system doesn't use pressure sensors in the tire valves. It basically uses the speed sensors (from the ABS, ESP, etc. systems) to look for wheels spinning at different rates. A tire significantly underinflated will turn at a different rate (think of the tread being closer to the center of the wheel). I guess the computer is programmed to ignore a temporary deviation (let's say you spin the wheel while taking off from a light or a slippery road), but enough change for long enough and it'll post a warning.

Remember to always check tire pressures regularly, since the system only notices bigger pressure (well, speed) changes.

As always, if my understanding is off, please post.

(Re: compass - posted in the other thread, my o/m says B200 Turbo only, under compass, although the brochure says I should have it with the premium package).

edit: Ron - if it says range: 206km under the fuel menu then yes, distance to empty, but don't rely on it too much. The other pages in the fuel menu should be fuel avg. since start (I think for the day, it says time driven also), and fuel avg. since reset.

Paul (Paulo Santos)
'83 W123 200, '98 W210 E200K, '08 W245 B200
* Feel free to PM me if needed *

Last edited by pfsantos; 12-09-2011 at 01:41 PM.
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#14 (permalink) Old 12-12-2011, 01:59 PM
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According to the instructions to reset the Run Flat indicator, those instructions are to be followed when you encounter the error message. The bottom half of those instructions are similar to when you want to reset the run flats at anytime, like after changing your tire pressures. Remember, that your tires will change by 1 pound of pressure with every 4 degree change in temp. So, it is a good idea to check your tire pressure every now and again and when you do, or when you top them off, quickly pop in and reset the indicator. You can reset the indicator this way too, if you get the warning. Just change your menu away from the warning to the tire pressure reset page.
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#15 (permalink) Old 12-12-2011, 02:12 PM
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Originally Posted by vanctour View Post
Remember, that your tires will change by 1 pound of pressure with every 4 degree change in temp, quickly pop in and reset the indicator.

So ,If we drive down south in the winter it can go from -20 to +20
Thats a lot of resetting

:LMAO: the perks of the B

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#16 (permalink) Old 12-12-2011, 03:21 PM
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So ,If we drive down south in the winter it can go from -20 to +20
Thats a lot of resetting

:LMAO: the perks of the B
Ha ha ha.

Well, likely not while driving, as the tires will warm up and stay at a pretty stable temp while driving. And likely all the tires will increase and decrease together, so, that the speed sensors won't notice a difference. I think the speed sensors are designed to pick up rapid air loss, or a major difference between tires (which results in rotational speed differences). However, when adding air, it is always a good idea to reset the speed sensors, It takes the computer about 1km of regular driving to calibrate the reset.

The temperature chnage thing I noted earlier above is for tires at rest in ambient temperatures. It would be a pain in the ass if I had to reset every morning, day and night with the temp changes, pretty funny if the O/M told us to do so.

Alot of people don't check tire pressures, so they fill up to recommended levels in the summer, and then the temp dips by 12 degress suddenly, the tires may look the same, but when measured, they may be down 3 psi. This affects handling, braking, tire wear and fuel economy. it may not trigger the sensor though.
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#17 (permalink) Old 12-13-2011, 07:41 AM
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In the 6 years + that I've driven this B, I've only had to do the reset twice. Once for air loss due to a metal sliver in the tread and quickly repaired, ..and then this fall with the winter wheel change and a few lbs pressure difference between the 4 tires.

Considering the +30's to -30's over the past years, it's never going to be a problem for us.
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#18 (permalink) Old 12-13-2011, 12:31 PM
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Never had an issue, even in switching from summer to winter tires.

2008 Mercedes-Benz B 200 5 speed
2006 smart BRABUS Tailor Made Canada 1 cdi cabriolet
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#19 (permalink) Old 12-13-2011, 09:55 PM
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I had the warning come on when I had the snows put on. I only had it pop up another time when I was on a rough rutted road by my cottage. Both times were cured with a reset.

I actually prefer this simpler setup than actual sensors in the wheels which require an additional set for the winter tires. And no error messages if you don't have the additional sensors.
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#20 (permalink) Old 12-14-2011, 06:58 AM
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The wheel sensors cost $100 a pop. So add $800 to winter and summer tire/wheelset costs. Plus a lot of them actually cause leaks. The ESP based system is better.

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