2000 Mercedes-Benz ML320 Q&A

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

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? -
Answer 1
CK MAINT AND SCAN CODES -