The OEM Bosch injectors were good for ~100K miles if you kept the fuel system clean. They'll last longer than that, but the spray pattern suffers. It isn't uncommon to see 150-200K on the original nozzles that seem "fine" until you see how the car runs after they're rebuilt.

The Bosch "India" injectors are good for 5 startups or 25 feet, whichever is shorter. Seriously, just stay away. Send your injectors off to Mark (Greazzer on this forum) and have the injectors rebuilt with Bosio or Monark nozzles.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]