coolant MERCEDES-BENZ METRIS 2020 MY20 Operator’s Manual

Wheel rim
The part of the wheel on which the tire is
mounted.
GAWR (Gross Axle Weight Rating) GAWR is the maximum gross axle weight rat-
ing. The actual load on an axle must never
exceed the gross axle weight rating. You can
find the maximum gross axle weight rating on
the
B-pillar on the driver's side ( Y page 304).
Speed index The speed index is part of the tire identifica-
tion. It specifies the speed range for which the
tire is approved.
GTW (Gross Trailer Weight) GTW is the total of weight of a trailer and the
weight of the load, accessories etc. on the
trailer.
GVW (Gross Vehicle Weight)
The gross vehicle weight includes the weight
of the vehicle including fuel, tools, spare
wheel, accessories installed, occupants, lug-
gage and the drawbar noseweight if applica-
ble. The gross vehicle weight must never
exceed the permissible gross weight (GVWR)
specified on the B-pillar on the driver's side
(Y page 304).
GVWR (Gross Vehicle Weight Rating) The GVWR is the maximum permitted gross
weight of the fully laden vehicle (weight of the
vehicle including all accessories, occupants,
fuel, luggage and the drawbar noseweight if
applicable). The permissible gross weight is
specified on the vehicle identification plate on
the B-pillar on the driver's side (Y page 304).
Maximum weight of the laden vehicle
The maximum weight is the sum of:
R the curb weight of the vehicle
R the weight of the accessories
R the load limit
R the weight of the factory installed optional
equipment
Kilopascal (kPa) Metric unit for tire pressure. 6.9 kPa are the
equivalent of 1 psi. Another tire pressure unit
is bar. 100 kilopascals (kPa) are the equivalent
of 1 bar. Load index
In addition to the load bearing index, a load
index can be stamped onto the sidewall of the
tire. It specifies the load-bearing capacity of
the tire more precisely.
Curb weight The weight of a vehicle with standard equip-
ment including the maximum filling capacity of
fuel, oil, and coolant. It also includes the air-
conditioning system and optional equipment if
these are installed on the vehicle, but does not
include passengers or luggage.
Maximum tire load
The maximum tire load in kilograms or pounds
is the maximum weight for which a tire is
approved.
Maximum permissible tire pressure
Maximum permissible tire pressure for one
tire.
Maximum load on one tire
Maximum load on one tire. This is calculated
by dividing the maximum axle load of one axle
by two.
PSI (Pounds per square inch)
Standard unit of measurement for tire pres-
sure.
Aspect ratioRelationship between tire height and width in
percent.
Tire pressure
Pressure inside the tire applying an outward
force to every square inch of the tire's surface.
Tire pressure is specified in pounds per square
inch (psi), in kilopascal (kPa) or in bar. Tire
pressure should only be corrected when the
tires are cold.
Cold tire pressure The tires are cold:
R if the vehicle has been parked for at least
three hours without direct sunlight on the
tires, and
R if the vehicle has not been driven further
than
1 mile (1.6 km)296
What you should know about wheels and tires
Wheels and tires

Example: vehicle identification plate (US vehicles)
Example: vehicle identification plate (vehicles for
Canada)
; VIN
= Paint code
i The data shown on the vehicle identifica-
tion plate is sample data. This data differs
for every vehicle and may deviate from what
is shown here. The data valid for your vehi-
cle can be found on the identification plate
of your vehicle. Vehicle identification number (VIN)
VIN in the engine compartment The VIN can be found on the vehicle identifica-
tion plate (Y page
304).
VIN : is also stamped into the longitudinal
member in the engine compartment next to
the fuse box. Engine number
The engine number is stamped on the crank-
case. More information may be obtained at
any qualified specialist workshop. Service products and capacities
Important safety notes
G
WARNING
Service products may be poisonous and haz-
ardous to health. There is a risk of injury.
Comply with instructions on the use, storage
and disposal of service products on the
labels of the respective original containers.
Always store service products sealed in their
original containers. Always keep service
products out of the reach of children. H
Environmental note
Dispose of service products in an environ-
mentally responsible manner.
When handling, storing and disposing of any
operating fluids, please observe the relevant
regulations.
Operating fluids include the following:
R Fuels, e.g. gasoline
R Lubricants, e.g. engine oil, transmission oil
R Coolant
R Brake fluid
R Washer fluid
R Climate control system refrigerants
Approved operating fluids comply with the
highest quality standards and are listed in the
Mercedes-Benz Specifications for Operating
Fluids. Only use operating fluids approved for
the vehicle. This is an important condition for
the Limited Warranty.
You will recognize the operating fluids
approved by Mercedes-Benz by the following Service products and capacities
305
Technical data Z

Transmission oil
Automatic transmission Operating fluid: automatic transmission
fluid Product name/number Maintenance
interval Mobil ATF 134 FE
Valvoline ATF Pro 236.15
MB Sheet No. 236.15 —
More information can be obtained at any quali-
fied specialist workshop.
Rear axle Operating fluid: transmission oil
Product name/number Maintenance
interval Mobilube FE 75W-85
Mobilube FE Plus NG
75W-85
MB Sheet No. 235.7 —
More information can be obtained at any quali-
fied specialist workshop.
Brake fluid
G
WARNING
The brake fluid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. If the boiling point of the
brake fluid is too low, vapor pockets may
form in the brake system when the brakes
are applied hard. This would impair braking
efficiency. There is a risk of an accident.
You should have the brake fluid renewed at
the specified intervals.
! Brake fluid corrodes paint, plastic and rub-
ber. If paint, plastic or rubber has come into
contact with brake fluid, rinse with water
immediately.
When handling, storing and disposing of brake
fluid, please observe the relevant regulations and the important safety notes for service
products (Y page
305).
Over a period of time, the brake fluid absorbs
moisture from the air. This reduces its boiling
point.
Have the brake fluid replaced at specified
intervals by a qualified specialist workshop.
i There is usually a notice in the engine
compartment to remind you when the next
brake fluid change is due.
Use only approved brake fluids that comply
with the Mercedes-Benz Specifications for Ser-
vice Products. Always check for the identifica-
tion DOT 4 plus.
Information about approved brake fluids can
be obtained:
R on the Internet at
http://bevo.mercedes-benz.com. Coolant
Important safety notes G
WARNING
If antifreeze comes into contact with hot
components in the engine compartment, it
may ignite. There is a risk of fire and injury.
Let the engine cool down before you add
antifreeze. Make sure that antifreeze is not
spilled next to the filler neck. Thoroughly
clean the antifreeze from components
before starting the engine.
! Take care not to spill any coolant on pain-
ted surfaces. You could otherwise damage
the paintwork.
When handling, storing and disposing of cool-
ant and antifreeze, please observe the relevant
regulations and the important safety notes for
operating fluids

(Y page 305).
Coolant additive with corrosion and
antifreeze protection !
Use only approved antifreeze/corrosion
inhibitor that complies with MB Specifica-
tion for Service Products, Sheet Number
325. Using other, non-approved antifreeze/
corrosion inhibitors may cause damage to 310
Service products and capacities
Technical data

the coolant system and reduce the engine's
service life.
The coolant is a mixture of water and anti-
freeze and corrosion inhibitor. It performs the
following tasks:
R Anti-corrosion protection
R Antifreeze protection
R Raises the boiling point
When the vehicle is first delivered, it is filled
with a coolant mixture that ensures adequate
antifreeze/corrosion protection. Coolant must
remain in the engine cooling system all year
round to ensure anti-corrosion protection and
a higher boiling point, even in countries with
high outside temperatures.
Check the antifreeze/corrosion inhibitor con-
centration in the coolant every six months.
The percentage of corrosion inhibitor/anti-
freeze additive in the engine cooling system
should:
R be at least
50%. This way, the engine cooling
system is protected against freezing down
to approximately -35 ‡ (-37 †).
R not exceed 55% (antifreeze protection down
to -49 ‡ [-45 †]). Otherwise, heat will not
be dissipated as effectively.
Mercedes-Benz recommends an antifreeze and
corrosion inhibitor that meets the require-
ments in the Mercedes-Benz Specifications for
Service Products Sheet Number 325.
More information can be obtained at any quali-
fied specialist workshop.
Operating fluid: coolant Product name/number
Zerex G40-91, The Valvoline Company
MB Sheet No. 325.5
Maintenance interval
Have the coolant replaced at specified inter-
vals by a qualified specialist workshop.
Capacities Engine cooling system
Coolant
Approx. 11 US qt
(10.4 l
) Climate control system refrigerants
Important safety notes The climate control system of your vehicle is
filled with the refrigerant R ‑134a.
The warning label for the refrigerant being
used can be found on the radiator cross mem-
ber.
! Only the refrigerant R‑134a and the PAG
oil approved by Mercedes-Benz may be
used. The approved PAG oil may not be
mixed with any other PAG oil that is not
approved for R-134a refrigerant. Otherwise,
the climate control system may be dam-
aged.
Maintenance work such as adding refrigerant
or replacing components may only be carried
out by a qualified specialist workshop. All
applicable regulations thereto and the SAE
standard J639 must be adhered to.
All work on the climate control system should
always be carried out at qualified specialist
workshop.
Refrigerant warning label Refrigerant warning label (example)
: Warning symbols
; Refrigerant capacity
= Applicable standards
? Part number PAG oil
A Type of refrigerant
The symbol : refers to:
R possible dangers
R the implementation of maintenance work at
a qualified specialist workshop Service products and capacities
311
Technical data Z