Mercedes-Benz C-CLASS CABRIOLET Operator's Manual page 335

Notes on the vehicle equipment – always equip
the vehicle:
with tires of the same size on a given axle (left
R
and right)
with the same type of tires at a given time
R
(summer tires, winter tires, MOExtended
tires)
Exception: it is permissible to install a differ-
ent type or make in the event of a flat tire.
Observe the "MOExtended tires (tires with
run-flat characteristics" section (
Vehicles equipped with MOExtended tires are
not equipped with a TIREFIT kit at the factory. It
is therefore recommended that you additionally
equip your vehicle with a TIREFIT kit if you mount
tires that do not feature run-flat properties, e.g.
winter tires. A TIREFIT kit may be obtained from
a qualified specialist workshop.
page 293).
Y
Wheel/tire combination
333
Z