lonewolf90

Hello everyone,

Picked up the 2012 C250 COUPE last week. I am having trouble checking the tire pressure of the car.

I selected "service->tire pressure->and "run flat indicator active press "ok" to restart message appeared.

So I restarted it and I read from the manual that it would show the tire pressure for all 4 four wheels after a few minutes of driving. However, I drove around 20 minutes and nothing showed up. It displays "Tire Pressure Monitor Active" instead...

Thanks for reading my question.

Cheers,

jkyriakou

Lonewolf

This function doesnt show tyre pressure. Only tyre pressure drops that are severe. It recently went off on my car as I picked up a puncture. Was quite handy in fact as I pulled into a garage and got the tyre repaired. The pressure had dropped to 23psi.

The reset just let's the system know what the correct pressure is so it knows what to compare it to. It uses the abs to do this rather than tyre pressure monitors.

JK

lonewolf90

JK,

Thanks for your reply. So, is there any way of checking the tire pressure when they are normal and not punctured? I remember seeing an image somewhere on the internet showing the psi of all 4 wheels on the dashboard display, but I am not sure how to go about it. Help please =)

cyberglk350

My 12 C350 does show the actual tire pressure at each wheel. I love having htis by the way and it is quite acurate as well. I am not sure why the C250 would not? If they skimped out on the advanced tire pressure system on the C250's that is seriously LAME. I thought in June of 2010 all MB models went with the more advanced system.

They used to have two different versions of the tire TPMS. One was called "Tire Pressure Monitor System" The other is called "Advance Tire Pressure Monitor System". Sounds like you have the "Not Advanced" system.

lonewolf90

OMG, I think I just have the basic tire pressure monitor system. Oh well, but it would tell me via a warning/indicator/message that my tire is punctured right? I am just really paranoid about this.

cyberglk350

Look at your Window Sticker and see what system was built into your car. I used to have a 2008 C300. I looked a my sticker and it shows "Tire Pressure Monitor System". That car had the basic like yours.

My new C350 Sticker shows "Advanced Tire Pressure Monitor System". My 12 does indeed show the pressure per wheel.

I had this same exact thing happen with the GLK350. I bought an early GLK350 and it did not have the pressure display for each wheel. Well, I traded that base GLK later in July that year and got another 2010 GLK (more options) and it DID have hte tire pressure displayed. The change happed in June of 2010. Any GLK built after June had the more advanced system.

lonewolf90

Sorry, I have a noob question. Where can I find my window sticker? I checked everywhere in the car and yet couldn't find it.

cyberglk350

Anytime I buy a new MB they always put the Window Sticker in the glover box. If you don't have one. You can contact MBUSA and they will mail one to you.

jkyriakou

C250 coupe doesn't have tpms. Just a tyre pressure WARNING system.

Not sure if the American market is different. Generally tpms is a mandatory requirement for run flats, which thankfully you don get.

lonewolf90

I see. Thanks guys.

Kevin82

American c250 here. My window sticker says "tire pressure monitoring system" and I am able to see tire pressure on all tires.

lonewolf90

Hi Kevin, I have a Canadian C250. Maybe I am just doing it wrong. But it can't be! Is there a special input on the buttons on the steering wheel of some sort?

So what's the right way of checking all the pressure on the tires? Thanks.

yukikaze203

Hey guys,
The canadian version of the car doesn't have the accurate tire pressure monitor system. In america, it's mandatory to have this system installed (the only country i think). When you have this system installed, each wheel must have a chip thing installed behind the valve so it can relay the psi pressure to the car. The downside to this is if you want aftermarket rims (for modding purposes), you need to install the same chip into each of the rims as well or else the onboard computer will yell at you every time you start the car. On the otherhand, the canadian (and many other countries) version uses some sort of algorithm (i forgot how) to find a discrepancy between the wheels. This version is less accurate and can only tell if there is, say, a puncture.

I have a C350 coupe in canada, and that doesn't have the accurate tire pressure monitor as well. IMO, I find that much better than the US version. If you really wanted to check the tire pressure, get down and dirty and actually twist open the valve cap and use a psi meter. Don't have a psi meter? Then go to any gas station, ask the clerk to lend you one, and inflate the tires there.

cyberglk350

My fault. Kevin is right. I looked at my 2012 window sticker and it does say "tire Pressure Monitoring System."

So IDK

lonewolf90

Thanks, so my Canadian version of the C250 coupe would only tell me if there's a puncture on the tires and not the full psi details of each tire? I think I can live with this system.

How often do you guys fill your tires? Just need a rough idea. Am new to driving a Benz =)

cyberglk350

I check mine with a gauge once a week. But I live in Colorado and the temperatures swing from warm to really cold often.

Remember if your car is in a garage, but the temp outside is really cold, you are supposed to adjust accordingly.

lonewolf90

Thanks, everyone! You guys are really nice and helpful! =) Oh, I live in Vancouver, so the climate is a little tamed.

yukikaze203

Haha, I do too! What colour's your 250?
I give a visual check of the tires everytime i remember. Then, i do an actual check with a gauge every month.

lonewolf90

Mine's a solid black C250 =)

yukikaze203

nice i'll try to spot you if i can :p try spotting a white c350 with blacked out letters and spoiler at the back

DinB

Here is the real issue for Canada that I didn't get a chance to tell you guys about: In Canada, you have to get an C63 AMG + Performance package to get the tire pressure monitoring system. I guess they figure that you will not care about tire pressure unless you are planning to race the car.

jkyriakou

I picked up a puncture the other day. System worked great telling me to check pressures.

I normally run 38psi in the fronts and it has dropped to 23.

Swung into the garage got the repair and was on the road in about an hour.

Kevin82

Sorry to hear Canadians don't have the psi meter.

Check once a month. If there is a big jump in temperature (ie: change of seasons) then check tire pressure.

jkyriakou

Check it when you fill up. Which with the diesel will be once a month!