Your 300E is supposed to use premium fuel, too.

The M112 V6 is a significantly better engine than your M103 and could return similar mileage even in the heavier, boxier vehicle.

Comparing trucks and cars is a bit like an apples/oranges comparison, but if you can use the ML's capabilities it will be worth it. Surely you'll get a test drive and ability to decide for yourself what you think about the ride.

If it hasn't had one yet, either ML will be due for a replacement MAF sensor soon. The originals just weren't very high quality.

If the MLs have navigation and/or built-in phone, just understand that anything prior to 2005 is ancient history in this area. The earlier stuff works, but when you find out about the newer stuff ... .

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles