Mercedes-Benz C-Class Coupe Operator's Manual page 342

Emergency spare wheel
340
Technical data
All vehicles (except AMG vehicles)
"Minispare" emergency spare wheel
Tires
T 125/90 R16 98 M
Tire pressure: 420 kPa (4.2 bar/61 psi)
T 125/80 R17 99 M
Tire pressure: 420 kPa (4.2 bar/61 psi)
AMG vehicles
Collapsible spare wheel
Tires
T 125/70 R18 99 M
Tire pressure: 420 kPa (4.2 bar/61 psi)
Only for C 350 and C 350 4MATIC.
10
10
Alloy wheels
3.5 B x 16 H2
Wheel offset: 0.79 in (20 mm)
3.5 B x 17 H2
Wheel offset: 0.79 in (20 mm)
Alloy wheels
3.5 B x 18 H2
Wheel offset: 0.79 in (20 mm)