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Old 06-27-2018, 12:27 PM
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Join Date: Aug 2007
Location: Middle Haddam, CT
Posts: 241
enlarged gas tank.

Just learned from several on line data sources that the 6.3 W109 used a larger gas tank than any of the other versions of this model...27.8 vs 21.7. Since the body shell is likely identical, I would imagine that they are interchangeable, which would not be a bad thing for the 4.5 given the lousy mileage that that US only model gets due to diminished efficiency of early smog compliance measures. Indeed, the pre 1968 6.3 got about the same mileage as the 1972-3 4.5 model!
Berfinroy in CT
Present vehicles:
1973 300 SEL 4.5
1959 Rolls Royce Silver Cloud I
Past vehicles;
1958 Bentley S 1
1976 ex-Max Hoffman 6.9
1970 300SEL 2.8
1958 Jaguar MK IX
1961 Jaguar MK IX
1963 Jaguar E-type factory special roadster
1948 Plymouth woody
1955 Morgan plus 4
1966 Shelby GT350H Mustang
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Old 06-27-2018, 08:44 PM
tyl604's Avatar
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Join Date: Feb 2008
Location: Atlanta, GA
Posts: 2,881
Thought '68 was the first year that the 6.3 existed and then MB really began to produce and then sell them '69-'70-'71. I had a '70 for about ten years. As I remember I got 10mpg on premium the entire time I owned it. Have no idea what size gas tank it had but I have the FSM someplace and will look it up when I get a chance.

How about posting a pic of the Silver Cloud.
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Old 06-27-2018, 08:44 PM
cth350's Avatar
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Join Date: Dec 2000
Location: Long Island, NY
Posts: 3,718
both interchangeable and hard to find at a reasonable price. -cth
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