I recently drove back to Colorado from California. The transmission in my 300E was shifting VERY firm at altitude, not banging into gear, but it was "kicking" a lot harder than normal especially at redline. Very worrysome, especially since It turned 200K on the way out, was just waiting for *something* to go wrong. The car lived at altitude for 20 out of it's 21 years, so it should be used to it.

Anyways, I'm back at sea level...and it shifts like butter again. Weird.

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http://i193.photobucket.com/albums/z...-RESIZED-1.jpg
1991 300E - 212K and rising fast...