No acceleration 1999 ML430, 101000 miles

My battery died after the truck sat in my garage for about 2 months. Tried jumping it (cant remember if key was in the ignition or not) but it wouldn’t start. Went out and bought a new one and put it in. Now the BAS/ESP light is on and I have no throttle/acceleration when I hit the gas pedal. Idle seems perfect in Park/Neutral and drive … when I hit the gas sometimes there is no change to idle, other times it becomes erratic. Here is what I have done so far: replaced plugs and checked coils, replaced MAF (if I disconnect the old or the new MAF while the car is idling, it switches off. Dont know if it is meant to or not), replaced CPS, checked fuel pressure (ok), removed and cleaned throttle, bought an OBD2 scanner (throwing code P0110 whether I use old MAF or new one), tried removing BAS light by turning wheel left to right several times (no luck), tried putting key in pos 2 for 2 minutes then pressing gas pedal to the floor and up and starting (no luck with this reset or several other variations). I am totally lost. Anyone have any ideas? I towed it into the dealer and they said I need a new MAF. After they put in a new one, it did the same thing. Then they said I need a new throttle (I told them to go pound sand, towed it home, and that’s when I tried everything else). I cant imagine why a battery dying would cause all these issues. It was running perfectly until then.

 

Thought I would provide an update. Towed it to the dealer. Apparently, my ECM experienced a voltage spike and stopped communicating. Thats why no resets worked and my computer would show any errors. No way to fix it. Only fix is to get a new one. The dealer replaced it and my truck is back to normal. Total cost $2515.28. Apparently ECMs can only come from germany and each one is vin specific. You cant get one from a junk yard or of ebay.

 

Alway there are other ways!!