Hope someone can give me some advice. I have a 1987 190E 2.6 that is failing at a Smog Test only station. I've change the spark plug wires, rotors & caps and catalytic converter. The smog check test report is below. Any advice would be appreciated.

HC(PPM) | CO(%) | NO(PPM)
TEST | MAX GP MEAS | MAX GP MEAS | MAX GP MEAS
M1: 15 MPH | 118 293 212 | 0.75 2.25 0.46 | 799 2002 2283
M2: 25 MPH | 93 243 128 | 0.63 2.13 0.26 | 738 1802 911