p0170 p0173 codes

[1995whitec220]

I just bought a used clk 320 cabriolet and the dreaded check engine light came on, The only thing I have done to the car is change the oil, disconnected the battery to check to see if the radio code worked, and changed the air filter.
I read the codes with my scanner and got p0170 and p0173, tried cleaning the MAF with tuner bath and light still comes back. Although car seems to run fine, There is black soot in tailpipe though. I hear a lot of talk about adaptation values I don't see that On my OBD2 diagnostics software though. Here are some of the numbers in my freeze frame maybe this will help

Short term bank 1: -50
Short term bank 2: -50
intake manifold pressure 11.2 in hg 38kpaa
intake air temp 147 deg farenheit
MAF rate 0.6 lb/min 4.6 gm/s
ignition advance -16.5 deg
coolant temp 189 deg f
engine load value 21.2 %
throttle pos sensor 2.7%
RPM 693

these numbers mean nothing to me, the bottom line should I buy a new MAF or is this a waste of money, I just want the light off so my wife will shut up