Cold-Resistant Service Products - Mercedes-Benz Unimog Operating Instructions Manual

Winter operation
224
Clearance between snow chain and drag link
X
Turn the steering wheel to the right as far as
it will to go.
With the steering on full lock, there must be
a clearance of at least 25 mm between the
snow chains and the drag link.
Cold climate package
General notes
To ensure that the vehicle can be started in
low outside temperatures, the following
optional equipment is available:
socket for jump-starting
R
auxiliary heating
R
fuel preheating system with water separa-
R
tor
You can also have coolant preheating retro-
fitted at a qualified specialist workshop. This
is operated independently of the on-board
voltage at 230 V.
If the vehicle is to be used in extreme cold
i
on a frequent basis, Mercedes-Benz rec-
ommends fitting the vehicle with the fol-
lowing equipment:
high-output alternator
R
heated windscreen
R
seat heating
R
Cold-start limits
Without optional equipment, your vehicle is
capable of starting at temperatures as low as
Ò15 †. When fitted with the optional equip-
ment and filled with cold-resistant service
products, your vehicle can be started at tem-
peratures as low as Ò26 †.
Engine starting may be impaired despite
i
taking appropriate measures if the vehicle
is exposed to temperatures lower than the
cold-start limits.

Cold-resistant service products

Service prod- Notes
ucts
Diesel fuel Winter diesel
Engine oil Cold-resistant oil
SAE 5W-30
Coolant Mixing ratio of
50% by volume
coolant/
50% by volume water
Axles 001 989 53 03 12
Steering 001 989 24 03 12
Hydraulic system Cold-resistant oil
SAE 5W-40
Have the vehicle converted to cold-resistant
service products at a qualified workshop.
Before attempting a cold start
Special measures must be taken before a
cold start if the vehicle has been exposed to
extremely low temperatures.
X
Charge batteries in a low state of charge
before starting.
X
Thaw frozen batteries before charging
them.
The fluid in discharged batteries may
i
freeze at extremely cold temperatures.
X
Do not rapid-charge cold batteries.