Ml430 acts likes it want to stall out when i stop

SOURCE: engine stalls at stop lights and stop signs

sounds like the torque converter lock up might not be disengaging. You might also want to check for engine vacuum leaks. Does engine idle smoothly when in park or nuetral ? if the idle is good I would suspect torque converter problem.

SOURCE: Hard shift into 2nd gear

suspect tune up (wires ,plugs ,filters )
check fuel pressure
and if u have check engine light on need to scan for codes
let me know

SOURCE: trans

I had a similar problem with my 1997 F250 only with 1st & 2nd gear. At the same time the ABS light was on and the speedometer was acting eratic. In my case it was a bad speed sensor on the rear differential. About $30.00 and took me less than 15 minutes to fix.

I'm assuming you have already looked at the trans for any loose or worn electrical or vacuum lines and connections.

SOURCE: Engine stalls when shifting into any drive gear.

It sounds like your idle air control valve could be going out on you.  The extra stress from being in gear can cause the car to stall out if the IAC valve isn't opperating properly.  The IAC is attached to the throttle body and is normally held on by two screws.  IAC valves are relatively cheap from AutoZone and easy to replace.  That would be my best guess based on your description.  Good luck and let me know if you have any other questions.  Thanks for an honest rating and for using FixYa!

SOURCE: my 2005 aviator shifts hard from park to reverse or to drive, act

I carried it to a Lincoln dealer, it in the shop now.