91 940 turbo multiple problems

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Just bought a 91 940SE turbo wagon ($300 dollars in Ohio & I am in Texas so long trip but what a buy) wagon w multiple problems. ran out of gas (fuel level showed 1/8 tank.) filled it & now runs tough & hesitates. Found a bill for stalling in the glove box. No diagnostic code & could not duplicate. Wheres the fuel filter on this car? Next : Power seats wont work (either side) fuse was blown so replaced, still not working either side. Last question: This car has the headlight & fog light set up.. want to change to the headlight only set up. Question is are mounts same as 90 & up 740? trim around theheadlight also? Thanks John

OOPS one last question manual says self leveling shocks (NIVOMATS?) if so how do you change to reg susp?