inorder to reset the computer on the ML 320 2002 will I loose security feature on the key or car and therfore will be unable to start the vehicle?
Please and thank you!

No.....................just make sure you have the radio code handy. My 2 cents.

i have seen on ML only that if the battery is disconnected and reconnected the key that is in the ignition will be permanently lost from the aam, i have also seen this happen when the car is jump started and the jumper is connected with the key in the ignition, now keep inmind this always isn't the case, but something to keep in mind. we had a local independent car dealer who had this happen on several cars when they would try to jump it.

__________________
1967 250 S
1967 280SE
1968 250S
1971 280 SE
1973 220
1974 280 S
1975 450 SEL
1976 220 D
1979 300SD
1983 300 SD
1985 230 TE euro
1986 280SL
1986 500 SEL euro
1986 190E 2.3
1990 300 SE
2003 C230 K
2004 C230 K
1987 560SEL
1987 300SDL now in canada
2005 C230
1998 C43 AMG Sold to DON
1993 190E 2.6
300TD Former daily driver Totaled
current:
R320 CDI
Ram 2500 Cummins

this happened to me once when I forgot to remove a key fob from my pocket and dove into the sea. other than that - replaced car battery once and worked on my car with battery disconnected multiple times - key fob stays in sync with aam.

ML320
in the ignition for approx 10min. Reconnected and just started the vehicle wothout driving it now the BAS & ESP light is illuminated???

I forgot to mention, turn the steering wheel all the way to the left then all the way to the right (or vice versa) to reset the BAS & ESP lights. My 2 cents.

do what you wish, just my suggestion to avoid an expensive problem, usually the aam and the key need to be replaced. just a good prventive measure.

__________________
1967 250 S
1967 280SE
1968 250S
1971 280 SE
1973 220
1974 280 S
1975 450 SEL
1976 220 D
1979 300SD
1983 300 SD
1985 230 TE euro
1986 280SL
1986 500 SEL euro
1986 190E 2.3
1990 300 SE
2003 C230 K
2004 C230 K
1987 560SEL
1987 300SDL now in canada
2005 C230
1998 C43 AMG Sold to DON
1993 190E 2.6
300TD Former daily driver Totaled
current:
R320 CDI
Ram 2500 Cummins

40km round trip no problems motor running at 80c
come home start up motor won't iginite - long engine turn, seperntine belt turning but won't start.
Disconnect battery car starts but dies adter 2 - 3 min
???

thanks for suggestion, Carson357 - I will keep it my mind. Basically my only wish for my truck to survive another year and I will be done with it. At almost 200k miles it is not fun anymore to keep it maintained well