Hi, I've purchased a 2005 C220 CDI Automatic. The car itself is brilliant but I've been having a few issues with it, within the two days I've had it. I believe this model is a 5 gear automatic gearbox. Whenever I'm in drive and use the manual gear selections it only goes upto 4 gears - does this mean it has only got 4 forward gears and it means the 5th would be the reverse? Also, I seem to be getting an average of 34mpg driving very very steadily, is this normal for this car? I know I'm having problems so this could be contributing to it.