The factory sticker on my c300 suggests, front-28, rear-33.. So at level should the warning light for low pressure come on. For some reason even at 27.5 and 30.5 psi the warning light did not come on. Also how can I make set new tire pressure values on the car -- I feel comfortable at front-30 and rear-34.

 

I believe that you go to the TPMS screen, which gives you the current values and press OK. it will ask if you want to make the current values the new limit. So you have to get them inflated to where you want them I think.

Because those pressures that you mentioned are recommended, doesn't mean that those are the set limit values.

 

thanks!!