Non running Mercedes 190E

My 190E has bit the dust. It started by missing, then stutering at takeoff, then it just quit running! I've replaced the fuel pump, the fuel filter, the fuel distributor, sparkplugs, rotary cap and button, but it's still dead. I'm considering a new engine, but the compression check on this one (187,420 miles) is from 159# to 174#. Anyone had any suggestions?