shashivr4

What is the correct air pressure for the front and rear tires of a W212 wagon (2013)? The door jam states one thing (35/41) and the inside of gas door another (35/48). When I fill my air pressure to 35 psi and 41 psi for the front and rears respectively as the gas cap states, I get a low air warning on my dash. When I fill my rear to 48, the warning goes off (yellow font turns white). However, the 35 psi in the front still remains yellow.

Thanks for the help.

GuestFromTampa

You can set you air pressure warning to any number you want it to be
RTFM i think its page 233

Alex.currie44

My experience on now 10 MB cars in the last 28 yr is the gas door numbers are the best guide.
The Canuck cars do not have the TPMS system the states gets and we have to set the pressures manually and reset the monitoring system. If a tire goes down the diameter changes and the wheel speed sensors of the ABS tell the system of a soft tire.
On the American systems the pressure sensors in the wheel itself read the pressures.
Assuming you have set things up in the system before setting the pressures and given that putting the rears up to 48 shuts off the caution and the front remains I suspect you have a system problem where the signals are not getting translated correctly.
Set the pressures manually to the gas door settings per the loadings until you can get the system checked at a dealer.

thefisch

Usually the driver door placard gives the max load pressure. Surprising that it would be less for the rear wheels than the gas cap. 48 is very very high IMO.