Originally Posted by bullockandrew
Then I took it for a drive and it wouldn't change up under hard acceleration; in fact it didn't want to rev at all to the redline even thought it was changing gears OK under more gentle (normal) driving conditions and changing manually OK.
Point is - here is the solution. With the engine off, turn key to ignition 1 and leave for 5 minutes. You might need to do this more than once. Apparently it is something to do with the adaptive throttle needing to be reset. Anyway, after doing this twice, all is 100%.
Your car was exhibiting what is known as Limp Home Mode
. Do a Forum Search or Google for an explanation.
If the battery was changed out properly you shouldn't have any problems. It's very important that the Neg.
terminal be removed first and put back on last otherwise a short to the system can occur. I just changed out my 2000 SL battery with NO problems.
1) synch. the ESP
2) synch the Windows
3) insert the Radio Code
4) adjust the Clock
Note: you should not have any concern with regard to the Drive by Wire Throttle or the Driver adaptive electronic 5-speed transmission.