According to the data card for your VIN, your car was delivered from the factory with a 722.369 transmission. That's a 4 speed automatic. I suppose your car could have been modified, but that would be extremely unlikely.....

Here's a PDF of the MB data card.

(attachment link removed as a courtesy to initial poster)

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1994 E320 Wagon, 230,000 miles
1995 E320 Sedan, 106,000 miles
1994 E500 Sedan, 79,000 miles