W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

My 300 non-turbo with 360K at best gets only 19 miles to the gallon of diesel. What is this car expected to get when running perfectly? I have owned this car for 2-1/2 years now, and the mileage has always stayed in the 17 to 19 mpg range. Other than that, the car has the usual issues that the older cars do, like worn vent pods inside the dash, old rubber seals on the rear window and doors. Is there anything that I can do short of disrupting the performance to increase my mileage? Thanks.

I have a 1974 115 chassis 240D. I've been having issues with the alternator belt losing tension and squealing. My problem seems to be the the infernal way the tensioning works, mostly with the rack that the star headed bolt moves along. The rack seems to move up when I try to use the star bolt to tighten the belt, regardless of how tight the rack bolt itself is. I tried to skip the whole silly star bolt thing by simply levering the alternator with a judiciously placed prybar and then tightening the pivot bolt and star bolt. It seems to hold for one or two trips to the grocery store before the dreaded squeals start again. I'm using the conti brand belts and have replaced the star bolt and nut.

I ahve recently been given a 1980 300d gold wagon, it is not running, why? ...I have replaced fuel filters except for the tank one also return lines, glow plugs, glow plug relay did a valve ajustment replaced battery... the motor cranks over and seems like it wants to catch but nothing what could this be ?// any ideas would be alot of help

I purchased the Mercedes Source Valve Adjustment wrenches and Manual soon after purchasing my first Mercedes (1984 300 D). And, faithfully, the valves have been adjusted ever since. ....Until today.. After adjusting 9 valves, the tenth one will not adjust. It is the exhaust valve on cylinder #2. I can't get the adjustment past .008in. Does this mean that the valve or seat is worn beyond tolerances? Or, am I missing a 'simple' solution? cory