hey guys

okay so Bjorn is still using too much fuel & it's to the point now I cant afford to drive it.
she's using about 12l/100km - now, i understand he's old and only a 3sp auto - but my 380SEL used about 14/100!!
i've gotten the fuel system checked and its come back ok - workshops in Australia dont really care about fuel systems so i dont actually know what/if they checked..

Would buying some of this maybe help? http://www.fueldoctors.com/
ive used a few other fuel system cleaners in my MB and they didnt seem to work but this stuff could be different?
any comments would be appreciated

thanks