www.vintage-trek.com ... should do it. Really breaks-down part by part allowing for ID of year. Very often used by members here, very precise. I'm pretty sure what year it is. I'll simply state that it's 88 to early '90s
Hey, would you believe me if I told you ? exactly ? You'd wish to check anyway.
You can also poke-around for blogs an' such by guessing at the year. Some of the techniums were road bikes.
ALSO investigate "Mombat", just like that. I'll forgo the URL.
The place shows all things MB.