I got a number of coupons in the mail from "Haus of Mercedes, Inc." and one of them arose some curiosity about maintance...

There is a service for FUEL INJECTION SYSTEM CLEANING:
It includes: Throttle body clean, intake track clean, reduce intake valve deposits, and Protec fuel injection cleaner.
I use Techron, and premium Chevron fuel, and perform maintenance meticulously... I wouldn't need this service on a C280 with 125k miles, would I?

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2006 E350 w/ 155k miles (Daily Driver)

Previous:
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!)