Specific Maintenance Questions
 

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?