I replaced the original injectors with bosch india rebuilds. The improvement was immediate, but only lasted 35,000 miles. The injectors were shot.

I kept the original MB injectors and searched for a long time before I found Pete Baranko at dbwllc(DOT)net in Boise. He rebuilt my injectors, installed bosio nozzles, shimmed, and tested each one to within one pound.

I installed them last week and they are awesome. Super easy start up, perfectly smooth idle, good acceleration, good power at speed, quiet all the way across the power band. I paid around $500 for all the work, but see it as critical and worth every penny. I recommend dbw without hesitation.

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2009 E320 Bluetec 117,000
1995 E300D 306,000 Sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000 Sold
2016 Ford Fusion 24,900