After chassis # A368937 the car has two pumps. Before that number (I'm guessing you are before) it would have one. No pumps in the tank as MB gavity feeds their pumps.

Fuel pressure readings are the only way to know.

If your trans starts in 2nd then it probably was meant to. Again depends on the years.

The MB CD is the first line of data for that car, aside from this site.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician