We drive these cars not mainly for the mileage but for the respect of engineering, the safety,the class, the style of them ...

For their time the W123 diesels were achieving MPG figures that others would dream about. Look at the 560SEL's and such of the time.. 15-17 mpg the 300SD's 24-25 mpg ish

right now they are still doing good for what they are, 40 year old technology on par with current standards... I would realllly like 40 mpg.. but I Reallly like driving my 300D