What is the mile expectancy on 1999 Mercedes Benz e 320 wagon?

If you are asking " how many miles will it go before serious drivetrain failure ?" 300k plus if properly maintained. If ,you are refering to fuel efficiency, I will share with you mine. I drive my 1999 E 320 wagon as if I have stolen it. Burn the cheapest lowest octane crap to be found. I check it at least twice a month. Im getting 25.6-26.3 mpg.