Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 279

If the parking space is on a steep downhill or
R
uphill gradient.
When snow chains are fitted.
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When a trailer or bicycle rack is attached.
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Directly after a tyre change or when spare
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tyres are fitted.
If the tyre pressure is too low or too high.
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If the suspension is out of alignment, e.g. after
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bottoming out on a kerb.
On steep inclines of more than approximately
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15%.
▌Parking with Active Parking Assist
Press button 1.
#
P223 0288 02
Driving and parking 277
Select Parking Assistance menu 2.
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Parking spaces 3 detected by the system are
shown in the central display.