New Battery Troubles
Thread Starter
Super Member
Joined: May 2005
Posts: 870
Likes: 1
From: East of I-287 South
01 ML55, 91 Supra Turbo, 05 Audi S4
New Battery Troubles
Purchased a new battery, old one left me stranded in Connecticut! Went to PEP Boys (Yeah I know) Never do that again,.....only place open a time with Bosch Battery... Ok I had battery installed, now my ML has loss of power and hesitation during hard acceleration and won't upshift without a couple of good stomps on the throttle, any ideas, feels like transmission is out of sync, is this possible? I know I had to re-enter security code for MCS. going to Mechanic tomorrow. 
MBWorld Fanatic!
Joined: Mar 2005
Posts: 1,744
Likes: 1
From: New York City
95 Audi urS6 Quattro
Originally Posted by hanniep
Purchased a new battery, old one left me stranded in Connecticut! Went to PEP Boys (Yeah I know) Never do that again,.....only place open a time with Bosch Battery... Ok I had battery installed, now my ML has loss of power and hesitation during hard acceleration and won't upshift without a couple of good stomps on the throttle, any ideas, feels like transmission is out of sync, is this possible? I know I had to re-enter security code for MCS. going to Mechanic tomorrow.
Thread Starter
Super Member
Joined: May 2005
Posts: 870
Likes: 1
From: East of I-287 South
01 ML55, 91 Supra Turbo, 05 Audi S4
Originally Posted by Militant-Grunt
When you disconnected the power from the car ( the battery ) that reset the ECU, your transmission is relearning how to drive, MB did that to me 2 weeks ago, it had slight hesistation, and was just acting weird... That might be the reason, but id still take it to a MB dealer.
took it to the mechanic and he reset all codes but is still hesitates a little until engine is warmed up to operating temp then it runs normal.
Thread Starter
Super Member
Joined: May 2005
Posts: 870
Likes: 1
From: East of I-287 South
01 ML55, 91 Supra Turbo, 05 Audi S4
Originally Posted by LiquidSmile
Sound like your Mass Air Flow Meter is going bad/dirty..... Do you have any codes/check engine light?
no lights/codes etc...I have them look at MAS next time.
