Not sure if this has been discussed before
The secret to resetting the service indicator on the 09 smart, not sure if this works with the 08 but this is the way the 09 is reset.
step 1: turnkey on, push left button twice
step 2: turnkey off
step 3: push left button and hold
step 4: while holding left button turnkey on
step 5: wait till 10,000 miles comes up then release left button.
there you have it straight from smart tech, I watched them do it on my smart to reset the indicator and took notes lol!
for some reason they made it very difficult to do it without a few hit and misses, at first if you don’t succeed try and try again.
but this is how you reset your service indicator
hope this help some of you!