Can anyone help me to identify my TREK mountain bike model from the serial number? I bought my TREK mountain bike in 1999 when I was living in Germany.
After a few years of use I moved &amp; it kind of got mothballed for the past 15 years for one reason or another.
I am now back on the road and its pretty much like new after some basic maintenance.
My query is what model is it (receipt is long gone).  Info that may help:

Serial number is: S99050362 (nothing on the http://www.vintage-trek.com/ looks relevant)
27 Shimano gears with Deore LX M570 STi shifters;
( Silver with black decals colour; fairly light weight metal (aluminium??) frame.

It may be a model manufactured from about 1996 onwards but I bought it in late 1999.
Any insight would be appreciated.
I have trawled the web but the serial number on the frame has no hits.
Pretty much all the yearly Trek catalogs and technical manuals for the 90s and 00s are found here:
http://www.vintage-trek.com/trek-fisher-klein-lemond.htm
There's also bikepedia.com and bicyclebluebook.com if you've got some idea of the model year and/or model number/name