My daughter's '89 300E was running down the highway, sputtered and lost power then died. Restart was possible then would die again. $200 tow to home later, the car will start and run for 45-60 sec without issue, then suddenly die like the key was turned off. The fuel pump can actually be heard pressuring up like when you first turn the key on.

Also, if the rev the engine to around 2K rpm, the engine dies much quicker, running then losing power then just dying...kind of like running out of gas.

Ideas? Perhaps filter?

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'89 300E 3.0
'82 350SD