Taylori64

I recently had a battery issue with my 2010 E350. After replacing the battery, I have a message upon starting the car that TPMS is inoperative. Just need to know what to do to get this back to operation. I have scoured the forum for an answer, and nothing posted works so far. Maybe I am reading it wrong or don't understand, but any help would be appreciated.

Thanks in advance.

Greg

boltonblue

Others have indicated that the wheels auto detect and learn the ID's of the wheels again automagically.
I'd be curious when you get a result. How far have you driven them so far?

Taylori64

The dash message says "TPMS Inoperative". I can't reset or relearn until it operates again. I guess I need to look for a fuse or something.....

imaphaetonguy

I've got the same thing - TPMS Inoperative.

How did you fix it?

belarus27

you cant reset it with OBD2 scanner?
highly doubt its a fuse...

Live Oak

My experience is that when you get "TPMS Inoperative," you also get a display indicating of which TPMS wheel(s) are inoperative.

Do you get that?

imaphaetonguy

I can clarify. Yesterday I sold my 2011 E350 and bought a 2012 E350. I had the dealer swap my aftermarket wheels off the '11, and onto the 2012.

The TPMS sensors were new in April 2014, and the TPMS sensors for 2011 vehicles are the EXACT same as 2012 sensors.

So, I did a wheel swap - did the "reset" via the dash, and drove 10+ miles and got the error.

After doing a search on this forum, many others have experienced this problem, with no one posting the solution.

Stopped by my tire installer yesterday, and he verified with his hand held device, the TPMS sensors are "awake".

So, MB must have a requirement to visit their Service, to reset the sensors, I am guessing.

imaphaetonguy

SOLUTION: Got it fixed at an independent shop.

Hooked up a computer thru the OBD port.

- deflated each tire & recorded each TPMS electronic ID #
- inflated the tires, and downloaded their ID # to the vehicle computer
- reset the TPMS - relearn function.
- drove for 10 miles and the TPMS reset.

Took about 25 minutes, and the indy was kind enough to do it for no charge.

BenzV12

That's good news and thanks for sharing your experience . If you don't mind if I were you ,I could gift them a chocolate

justaguy

So the mechanic worked on your car for free for 25 minutes ... Maybe he was having a mental breakdown or you had one after you saw the charge ....

Anyway the tpms units were installed in your wheels for a specific reason and having them serviced for free may be reported and leave you open to severe consequences .

In addition you are making owners who pay through the nose for any type of service look bad .

QUOTE=imaphaetonguy;6088639]SOLUTION: Got it fixed at an independent shop.

Hooked up a computer thru the OBD port.

- deflated each tire & recorded each TPMS electronic ID #
- inflated the tires, and downloaded their ID # to the vehicle computer
- reset the TPMS - relearn function.
- drove for 10 miles and the TPMS reset.

Took about 25 minutes, and the indy was kind enough to do it for no charge. [/QUOTE]

Arrie

Chocolate!!!???!!!

I think a case of beer or two of their choice is more appropriate. That's what I would do.

But I think the dealer where you swapped the cars and tires at should have done all this for you.

Arrie

[/QUOTE]

I think it makes some other people look smart.

What in the he'll is wrong with you justaguy?

CEB

[/QUOTE] Huh? What severe consequences?

There are lots of reasons why the shop may have it for free. Maybe he is a good customer? Maybe he isn't a customer yet but they want him to be? Maybe the shop decided it was a challenge? Maybe the shop doesn't charge for adjustments that take less than a half hour? Maybe he was the millionth customer and got free service? Maybe all customers who wore a green hat got free service that day? Maybe....

The cost of a service has nothing to do with any "severe consequences".

Years ago I had an Audi S6. The local VW dealer sent me a coupon offering a free oil and filter change for any VW or Audi car. I took them up on it and about a half hour later the service manager comes out and apologizes for the delay and said it'll be another half hour because they had to send somebody to the Audi dealer for a filter because they didn't have the right one for my V8.

That was free. I hadn't been a customer there before and it actually cost them money in addition to the labor (with the sensors it was labor only). Why did they do it? I ended up buying two cars from them in the next few years, sent them other customers and had all my servicing done there.

So, please explain those "severe consequences".

eNNCity

I just ordered a new set of wheels that will arrive with tires mounted and balanced and have the TPMS sensors.

Is there a process I'll have to go through to get the new sensors recognized by the car? I was wondering how they work and the signal is received since it's actually inside the tire.

CEB

There is a really long wire (about 50 miles long) that connects each wheel to the computer. It wraps around the axle. Once you've driven 50 miles, then you need to drive in reverse for 50 miles so that you can unwind that wire.

TPMS is really just a pressure sensor. It connects wirelessly to the receivers.

eNNCity

Thanks for that! I needed a chuckle hahaha

I guess what I meant to say was what type of signal is sent wirelessy, considering electronics connect through bluetooth in the cabin. Would the car automatically recognize the new sensors or is there set up you have to go through in the dash menu?

CEB

The new sensors should be read automagically but here is the procedure if they aren't.

I'm blanking right now on the frequency but it isn't BT.

eNNCity

konigstiger

Battery powered sensors (MB part #0009057200) are read via radio (433 MHZ) by TPM control unit then signal is sent via CAN to instrument cluster.

medamullet

posting to find and read later. I am having the TPMS problem as well. first the message said passenger front tire couldn't read the sensor then went off for about 3 or 4 days. Today the code came back on but now says inoperable and I can't see the tire pressure on any of the wheels.

medamullet

Figured mine out. Fuse 70 in the trunk was blown. Not sure why be things are all good now.

Felix Lukaschew

Hi Mate, could tell me please what sensor you are talking about? Have got same problem with new Schrader sensors. My mechanic can see pressure in tyres but getting error by scanning single one . And where about to find electronic ID ? Thank you