I have a 2008 300C SRT8 with the 4/23/07, Version 6.10h, P/N 06172122AE EVIC software. Is this the latest revision? If not can it be updated to any later revision? I saw a post that said he could go to the digital speedometer screen and push the dash trip stalk on the Trip B scale and read the top speed that the car has been driven. I tried this, and another 2008 user here said he tried also, without success. Thanks, regards, Bob.