When i start my car a lttle tool with a number that keeps counting down comes on on 2000 Mercedes-Benz ML320

after i got an oil change a tool like sign on my dash board keeps counting down. A couple days ago my dash board said hi oil and beated what does this mean?

by in Sweet Grass, MT on June 11, 2013
1 answer
ANSWER by , June 11, 2013
CK MAINT AND SCAN CODES