The button to pop the trunk is hidden inside the driver's door pocket. Some older models had it in the glove box.
Our 96 Volvo 850 wagon 5 speed (non turbo) with an older version of the same 5 cylinder engine can manage 32mpg highway so the 29 mpg is totaly in line with expectations. The first 6 years of the S60, volvo offered a non turbo and a 5 and 6 speed manual in America on both turbos and non turbos. You could even get a 5 speed wagon. Unfortunately they decided to stop importing these versions a couple of years ago. The manual transmission is being relegated to "sporty" models like the C30 and C70. Oh well. That 5 cylinder engine dates all the way back to 1991 yet its still a pleasure to drive today. It was way ahead of its time. The 3500lb weight of the S60 is very disappointing. A 2001 or 2002 NA 5 speed would make an excellent used buy. Unfortunately new volvos depreciate faster than yesterday's newspaper.
http://sfbay.craigslist.org/eby/car/651799591.html