aftermarket wheels & tyre pressure sensors

[brabus]

Hi 2005 CLK newbie here

what happens if i change my wheels and dont put in new tyre pressure sensors? will there be warning messages all over the dash or should i not worry about it?

I would prefer to have the handy sensors, but probabaly wont get around to fitting them for a while so just wondering is it gonna stuff things up

[MX-5.0]

I did not know that there was an option for tire pressure monitoring in the car. Maybe it's a regional thing? I do know that somepeople in some car that didnt like having them on all 4 wheels, put them all in the spare tire and keep the system happy like that.