I have a 98 mercedes benz ml320 elegance, 81,000 km, V6 with a check engine light on... My obd2 scanner shows up DTC's p0170, and P0173, which stands for

P0170 Fuel Trim Malfunction (Bank 1)
P0173 Fuel Trim Malfunction (Bank 2)

has anyone dealt with this problem before? I know its not the O2 sensors.. I don't know where to start.. but from your experience which part should I replace???

Replace Intake Manifold Gasket
ECU Sensor
MAF Sensor
Fuel Pump
EGR Valve

I believe this is a common problems from the ml320's.. I also attached some data maybe it would help you have some idea on the solution! Thanks!

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