Well driving around today I DEFINITLY noticed a difference! It held on to gears much longer, primarily 3rd gear. And my mpg has been reduced to about 50 miles per quarter tank (about 13 gallons); yes I drive hard, but the worst I've ever gotten is 17 mpg. Have a bottle of Techron and I'm going to check tire pressure also though.
I am going to spin it a whole bunch the other way and we'll see what happens!
(Just a note, when I was observing the shifting and driving kind of rough/hard, I really appreciate and love how tight my car feels. Someone please tell me the difference between the 230 and 280's suspension!)
2006 E350 w/ 155k miles (Daily Driver)
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)