Go for the 90-93 300D 2.5 turbo...most of those cars were pretty stripped(MB Tex seats,no headlight washers..etc) as compared to 300/400E's of the same time...but compared to the 123 you will notice a world of difference in driveability and acceleration and fuel mileage...and get a few more(in my opinion) needed frills...ABS,AIRbag and an updated interior...and drives like a dream....drove mine 130K miles and never put anything in it except a vacuum pump....no the 140 I own now is another story...and btw don't even consider a 140 unless you consider yourself a very skilled tech..lol

Warren
1992 300SD 144K
Columbus Ohio