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Two Fuel Pump

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I have a 87 190E 2.6 and I was wondering why is there 2 fuel pumps?
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'85 2.3-16 '99 C280 '11 GLK350
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Not entirely sure, but the dual pumps were also accompanied by changes in the Bosch fuel i...

Not entirely sure, but the dual pumps were also accompanied by changes in the Bosch fuel injection system in mid-87, so that may account for the need for the extra pump.
 

· BenzWorld W126 & W201 Host
1988 420SE, 2002 C180 Kompressor, 200 ML320
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Dual pumps

Bugman

The reason that i believe there are two pumps is because there are six injectors on the 103 6 cyl engine, compared to only four on the 102 4 cyl version, and to keep all six injectors under pressure would be too much for the single pump.

That's not the official version, just what my knowledge of the system leads me to believe.
 
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