Quote:
Originally Posted by sixto
IIRC the 350SD has a 2.65 diff. I’ve read these cars don’t cruise as efficiently below 2500rpm because of turbo boost and TC stall profiles. For reference, E300s with 722.6 have a 3.46 diff ratio.
Sixto
98 E320s sedan and wagon
02 C320 wagon
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Thank you. This may not be worth trying after all but I'll try to get more information on this. The 3,000rpm at around 72mph just 'feel' pretty high but if that is the rpm the motor operates best in then it obviously makes no sense spending lots of time and money to make it drop to something like 2,500rpm.