The fueling is entirely mechanical, there's no sensor anywhere on the car that will affect the fuel delivery. Check your accelerator linkage and make sure when the pedal is floored that the rack lever on the back side of the IP is against its stop.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]