after an oil change a red light on control panel lit up stating reduse oil level on 2003 Mercedes-Benz SL500

afer driving about 3 miles. stopped to ck oil on computer which ststed oil level ok and no more malfunction..but reduse fuel level continues to come on and states malfunction what is this about. do i have to go to a mb dealer is their a code for this. thanks ray

Asked by for the 2003 Mercedes-Benz SL500