Yes.

The 420 and the 560SEL can live with their 2nd gear starts quite easily. They have some decent muscle off the line, even with their tall gearing.

The 560 nets about 15 mpg mixed driving, and the 420 about 20 mpg in my experience.

The 560 is the one that has the performance advantage. It reaches 60 mph in about 7.6 seconds while the 420 takes about 8.7 seconds. The V8's are grossly cheap right now, and the M116/117 are beauties so long as you monitor your chain replacement intervals.

They cannot touch an SDL though for mileage. On good fuel I'll net 30 mpg while a 420 can only get about 22 mpg under the same conditions. And you must use premium unleaded for long emissions equipment life and acceptable fuel economy (otherwise the spark is retarded). At least 91 octane. So, the difference between premium unleaded and diesel now is about 2%. Compared to the 27% gain in fuel economy. I still love diesels.