Mercedes-Benz A-Class 2021 Operator's Manual page 329

Mercedes-Benz recommends that you have the
oil change carried out at a qualified specialist
workshop.
Quality and capacity of engine oil
Gasoline engines MB-Freigabe or MB-
Approval
All models 229.71*
* Recommended for lowest possible fuel con‐
sumption (lowest SAE viscosity class in each
case; observe possible restrictions of the
approved SAE viscosity classes).
To achieve the lowest possible fuel consumption,
it is recommended to use the engine oil specifi‐
cations marked in the table for the lowest SAE
viscosity class. Possible restrictions of the
approved SAE viscosity classes must be
observed.
The following values refer to an oil change,
including the oil filter.
Model Capacity
All models 5.8 US qt (5.5 liters)
Notes on brake fluid
Observe the notes on operating fluids
( page 323).
/
& WARNING Risk of an accident due to
vapor pockets forming in the brake sys‐
tem
The brake fluid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. If the boiling point is too low,
vapor pockets may form in the brake system
when the brakes are applied hard.
This causes the braking effect to be
impaired.
Have the brake fluid renewed at the
#
specified intervals.
Have the brake fluid regularly replaced at a
qualified specialist workshop.
Technical data 327
Only use a brake fluid approved by Mercedes-
Benz according to MB-Freigabe or MB-Approval
331.0.
Coolant
Notes on coolant
Observe the notes on operating fluids
( page 323).
/
& WARNING ‑ Risk of fire and injury from
antifreeze
If antifreeze comes into contact with hot
component parts in the engine compart‐
ment, it may ignite.
Allow the engine to cool down before
#
adding antifreeze.
Make sure that no antifreeze spills out
#
next to the filler opening.
Thoroughly clean off any antifreeze
#
from component parts before starting
the vehicle.