“1000 mile trip with some speeds at 90mph”
That reminded me of some extended cruising in the 91 300e 4Matic at the same speed! And that’s when it had about 200k on the clock. Incredibly smooth and quiet. Another great MB that I was sorry to see go (sold with about 240k).

That car leaked / burned oil since the day I bought it with 60k. It started with adding 1 qt. before each 5000 mile oil change and progressed to 2 qts. between changes (about a quart every 1250 miles). The type of oil made a difference (15W40 worked best for me). I’m sure I had internal leakage, but there were also external leaks (front cover and valve cover). I thought I was burning more before I sealed the external leaks. Make sure you take care of those if you have any.

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07 E350 4Matic wagon, 06 S430 4Matic, 99 SLK 230
retired W210 (x3), W124, W126