BAS ASR light

just came on in my 1998 C280. ASR isn't working.
can anybody help me? thank you

Very first thing to check...are your tires worn?, Next question...Did you replace tires recently?

wow that's it thank you

Which was it, worn tires? New tires themselves should not cause a problem unless you put a different size on, or just replace two and leave two that may have wear on them.