About new car oil change

I bought a brand new 2015 Mercedes GLA 250, but it was made Dec-18-
2014. When I got the car, the engine light was on, but after one night, it was
gone, i thought it was the battery causing the this problem. However, next
day, my car show a message that service A exceeded 12 days, so I think my
engine oil may be too old so my engine light was on, then I took my car to the
dealer, asked them to change oil, but they just reset my service A message,
and did not do anything, then I asked them the engine oil is good for another
year, they said it is find. My question is should I change my engine oil now, or
I wait until next year November to change. Now my car only has 490 miles,
and 1 year old engine oil.