Mercedes-Benz M-Class 2007 Owners Manual - Manual (Page 539)

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Technical data
Rims and tires
Spare wheel
Minispare wheel
Spare wheel with collapsible tire
ML 320 CDI
ML 350
ML 500
Rim 4.0B x 18 H2
Wheel offset 1.58 in (40 mm)
Minispare tire 1
1 Must not be used with snow chains.
T 155/90-18 113M
Recommended tire inflation pressure 61 psi (4.2 bar)
ML 63 AMG
Rim 5.5 B x 19 H2
Wheel offset 0.51 in (13 mm)
Collapsible tire 1
1 Must not be used with snow chains.
185/65-19 104P
Recommended tire inflation pressure 51 psi (3.5 bar)