This may be a strange question, but I have heard that the 420SE is more economical than the 300SE.
I know it's quite a difficult question, but let's say that they were both in good condition and 1990 year.
I was reading on another site a few days ago, that 420's often get into the 20+ mpg range.
Any comments appreciated!
---My Previous MBs---
87 300SE (Sold) - Black, Cream Leather
89 300SE (Sold and missed) - Black, Cream Leather
87 420SEL (Died!) - Bronze, Black Leather
---Father's Previous MB's---
2004 S320 CDi - Black, Cream Leather, 18" AMGs
2001 CL500 (Stolen!) - Black, Cream Leather
1999 E55 AMG - Black, Black Leather
1994 500SE - Black, Cream Leather
1990 300SE - Midnight Blue, Cream Leather
1986 420SEL - Diamond Blue, Cream Leather