I sent my amp and actuator to GDL few years ago.

Peter I think rebuilt the Amp, electronics, but said the actuator was a basket case and sent it back apart.

I tried a used but good one from a fellow on this site but that didn't work.

So I unplugged it when Wife to told me it sort of felt like the petal went down in a parking lot.

I never experienced that but I figured safer to unplug.

I may have a good used actuator now but haven't had the gumption to trouble shoot further.

It could be something on the steering stick wheel I guess.

Not sure what do check next, meantime, unplugged.

Yes, GDL, was pricey but redid the board entirely not like Programma.

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1982 300SD