FWP!

Hey all, I should have probably included this in my other thread, but a friend with a 507 is having an issue with the TPMS warning her about low tire pressures every couple weeks. When I check the car out, the pressures are down by at most 2 PSI, is the system really that sensitive? Is there any way to change that? It has been pretty hot here in Phoenix so I can see how the pressure probably changes a lot going from sitting in the cool garage all night and then driving in the 115 degree heat.

When she gives me the car to take a look at it, the tires are *mostly* hot, so I over-inflate them a little on purpose thinking that they will drop a little once they cool down, but what do you guys recommend?

Gerry_M

You can reset the reference value to use current pressure as new reference
values.

http://www.tpmsdirect.com/Mercedes_B...dure_a/803.htm

FWP!

Thanks much!!

flubbernub

This happens on my car as well and the outside temp doesn't exceed 85 degrees Fahrenheit on most days. I thought it was a bad sensor because similar to yours, it's never off by more than two PSI.