Mercedes-Benz 2001 ML 55 AMG - Manual (Page 259)

256 Towing
Technical
data
Instruments
and controls
Operation Driving
Instrument
cluster display
Practical hints Car care Index
ML 320, ML 430
The rear towing eye is located behind the right side
cover in the bumper panel.
2 Towing eye, rear
Cover removal:
Using a flat blade screwdriver pry out the cover.
Cover installation:
Engage cover at bottom and press in top securely.