243 Tires, Wheels
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index Important!
To realize the total crumple zone in case of a rear end 
collision, the space-saver spare wheel must be stored in 
its holder with the tire deflated. Properly inflate the tire 
prior to mounting it on the axle. See page 249 for 
detailed instructions.
When storing the space-saver spare wheel in its holder, 
tighten the three wheel bolts with a tightening torque of 
37 ft.lb. (50 Nm).Space-saver tire (except ML 55 AMG) 
Removing spare wheel (space-saver tire):
1. Hold left and right side of cover (1) at bottom and 
pu ll aw ay  fr o m  b u mpe r  ( arr ows ) .
P40.10-2368-26 
248 Tires, Wheels
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index
Using the wrench, tighten the five bolts evenly, 
following the sequence illustrated, until all bolts are 
tight. Observe a tightening torque of 110 ft.lb. (150 Nm).
Ensure proper tire pressure.Notes:
The removed road wheel cannot be stored in the 
space-saver wheel carrier or inside the storage 
compartment in the rear cargo area (ML 55 AMG), but 
should be transported in the rear cargo compartment 
wrapped in a protective cover supplied with the vehicle. 
The protective cover is located in the rear cargo 
compartment behind the cover in the right side trim 
panel.
Model ML 55 AMG:
Store air pump in its proper location. Close and latch the 
spare wheel cover, see page 239.
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Wa r n i n g !
Always replace wheel bolts that are damaged or 
rusted.Never apply oil or grease to wheel bolts.Damaged wheel hub threads should be repaired 
immediately.Incorrect mounting bolts or improperly tightened 
mounting bolts can cause the wheel to come off. 
This could cause an accident. Be sure to use the 
correct mounting bolts.