You can buy a $500 scanner, but it won't work on your car.

If you dont hear the fuel pumps run when you turn the key on, then that is probably your problem.

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'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E