Just completed a 2000 mile trek in my '91 300CE and did not get as good of gas mileage as I was hoping. Car only has 63,000 miles on it and I bought it this summer. In June, I drove it back to Ohio and got 24-25 mpg and this trip I only got 18-19 mpg. I just replaced the fuel accumulator before we left to try and fix a warm start problem.

Question: We put a soft-side cargo bag on the roof - probably 45" X 32" X 18". Would that effect mileage this much? Any other suggestions? All interstate driving, 75 mph, no A/C - and car ran great!

One other, possibly related question: the accumulator does seem to have helped, but I did notice when removing the gas cap that I don't hear that pressure relief. Gas cap is new, but I bought it at a Mercedes repair shop and it looks like the black ones on the online parts shop - although the guy who sold it to me did say that it wasn't for my exact application??

Thanks, ryan

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RG Newell

1984 300D
1972 250
1986 560SL
1991 300CE