I have never tried such a manual reset and I might have confused the issue. I did three readaptations yesterday on a 202 car. BUT! it was an ME car.

As Authur pointed out , briefly, the throttle is controlled by a separate controller on HFM cars and OBDII (check engine light) diagnostics are done on a third module. While monitoring of adaptation state is faulted in DM, the actual adaptation is done in HFM. Clearling mixture adaptation in HFM probably won't require a throttle relearn as it does in ME, although it never hurts and is done every time one turns the key on and lets it sit for 30+ seconds with the key then being turned off.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician