Dealer may well have locked your service functions 3-18!
Press and release button on the right and if you see "lock on" you will need to unlock these functions.
To Unlock Functions 3 - 18:
Press and release the trip mileage reset button and advance to "Test Nr 19"
Now using your VIN, add the digits of the last 4 numbers to create one number.
Example: 5484 = 5+4+8+4 = 22