I have removed the throttle body and cleaned it (it was not very dirty, it looked normal).

I looked at the cable and looks fine no cracks.

The car was driven daily, but running rough lately.
The problem started when I removed wires ( 2 or 3 on driver side )from spark plugs and put them back.

Today I kind of got excited and thought I fixed the problem.

When the car was running I disconnected the air mass flow sensor, than did the tps reset and restarted the car, all power back and I was able to drive with no problems.
After shut down back to the same code p0120, ( I was able to do it 2 times and drive normal)

I have only a generic code reader and it shows p0120 only.

I am not sure what should I try next

Thank you for your input and time

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2008 ML320 CDI
2007 GL320 CDI
2005 Audi A6 (sold)
2001 E320 (sold)
2004 lexus RX330 (sold)
2004 Honda CRV (sold)
93 190E 2.6 (sold)
97 E320 (sold)
2000 Honda CRV (sold)
91 350SD (sold)
90 E300 with amg body kit (sold)
83 300sd aqua marine (sold)
81 300sd dark blue (sold)
81 300sd gold (sold)
81 300sd brown (sold)