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 (car switches off if I disconnect MAF while car is idling. Both old and new does this. Dont know if that is normal), 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.

Any updates on your problem? I am in the same boat with my 99 SL500. All same symptoms but battery was OK. Local indy has car now and says Throttle body also. I have bit the bullet and got a second hand one but am awaiting delivery from the US. I am in Australia.

i had this exact problem stuck at at burning man when my battery died....when it finally got towed to a great indy shop in reno...they just needed to reprogram my accelleration module..cost like 120...i was amazed... goodluck!

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 not show any errors. No way to fix it. Only fix is to get a new ECM. 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. Dont know how much of this is a crock of you-know-what but my ML is running again.

New control modules must be coded to the vehicle after installation. You usually can't get a used one to work because they are locked after getting "married" to the system, but an unlocked control module can be used in multiple vehicles and just coded after installation in each one as long as it isn't locked. You got an unfortunate lesson on why you have to be super careful on jumping Mercedes (and just about any late model vehicle). Its better to call Mercedes 800 number and have them come out and install a new battery on-the-spot (it only costs about $120 or so).

Yes it's better.

It's also good to read all the words in owners manual regarding jump-starting before proceeding, too.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles