It sounds like you are in limp mode. First check the overvoltage relay. Have you had battery problems or jump started the car lately? If so, the fuse is most likely blown. Check the relay and the fuse. It is behind the battery behind the black cover.

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Benzmac:
Donnie Drummonds
1992 500E (very soon I hope
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
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