wrench

As stated in one of my previous post, I ordered the qs3 shocks for our pioneer. I installed them over the weekend but the shocks did not come with a spanner wrench to adjust them. Is there a specific one or size I need?

Does the wrench only appear on the display in 1st and 2nd initial oil change intervals or will it pop up every 600 miles or so, or do I need to keep track of the miles everytime I need an oil change.... is it every 400 miles or 600?