E550-Coupe

hi guys, my ML keep showing check tire pressure warning, and i checked all tires and seems fine. what else am i missing?

lkchris

Did you reset it?

gsrjc

what kind of tire pressure gauge did you use? i had a cheapo brand and it actually told me the air pressure was 4psi higher than the current one that i have. It was rated as one of the best small tire pressure gauges.

http://www.vat19.com/dvds/accutire-d...cfm?adid=gbase

E550-Coupe

yeah i did. it's just a message right now, but sometimes red light warning comes on. and sometimes they don't.

E550-Coupe

so you are saying that higher air pressure also gives warning? if so, i'd better check that too

gsrjc

sorry, my cheapo tire pressure said that i had too much air in my tires, so i let our 4 psi because i thought it was correct. the warning message kept showing up so i couldn't figure it out so i purchase a good tire pressure gauge and then realized the cheapo one sucked. after using the Accutire gauge that i have, the warning went away.

another problem might be the change in temperature as i see you are in Canada. has the temps changed dramatically lately.

E550-Coupe

yeah temp changed but this msg been up since summer time. so i don't think it's cause of the temp. would it be sensor failure?

G35cJ

Since I presume each tire has its own pressure sensor, why the ML won't display the actual tire pressure for each tire? That would make life a lot easier. Or is there a hiden menu that I have yet to discover?

sosh

Until 2010 the tires did not each have a pressure sensor. They depended upon a sensor that compared tire rotation. That system does work and it saved me a couple of times with the 06 ML500 I had. Now with US cars in 2010 there is a pressure sensor in each valve stem (Not in Canada as I understand) and it shows tire pressure for each tire.

G35cJ

Thanks for teh clarification.

gsrjc

Could be a sensor problem then... take it to the dealer.

lkchris

Every time the system is reset, you've told it the pressures you want.

IF you then reduce pressures for some reason, you'll get a warning message.

IF you've reduced it to something you want to go with in the future, you must do a reset.

Nelson Chen

Hello: I understand that the '09 Ml320 bluetec tire pressure indicator does not show pressure of each tire. If I were to purchase tire pressure valves for each tire, would the tire pressure console show the pressure for each tire?

Moto One

Our TPS kicked off last night for the first time after having new tire installed this week, and a trip to the Valley and back in witch there was a major temp change along with 6k in altitude. The next morning I check the pressures and found that three of the tires had 50+ lbs, and one at 40. The Discount tire shop made a point of telling me that they set the pressures at 32F/39R, and with new tires of a different brand I thought at first that the road thump on the highway joints was just the tire not the pressure. Wrong!!!.

After a rest of the pressures it's all good.

Mark