Mercedes-Benz S-Class 2020 Owner's Manual page 501

498 Technical data
& WARNING Risk of an accident due to
vapour 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,
vapour pockets may form in the brake sys‐
tem when the brakes are applied hard.
This impairs the braking effect.
Have the brake fluid renewed at the
#
specified intervals.
Have the brake fluid regularly replaced at a
qualified specialist workshop.
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 491).
/
& 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
#
you top up the antifreeze.
Make sure that no antifreeze spills out
#
next to the filler opening.
Thoroughly clean the antifreeze from
#
component parts before starting the
vehicle.
* NOTE Damage caused by incorrect cool‐
ant
Only use coolant that has been pre‐
#
mixed with the required antifreeze pro‐
tection.
Information on coolant is available at the fol‐
lowing locations:
in the Mercedes-Benz Specification for
R
Operating Fluids 310.1
at https://bevo.mercedes-benz.com
-
in the Mercedes-Benz BeVo app
-
at a qualified specialist workshop
R
* NOTE Overheating at high outside tem‐
peratures
If an inappropriate coolant is used, the
engine cooling system is not sufficiently pro‐
tected against overheating and corrosion at
high outside temperatures.
Always use coolant approved by
#
Mercedes-Benz.
Observe the instructions in the
#
Mercedes-Benz Specifications for Oper‐
ating Fluids 310.1.
Have the coolant regularly replaced at a qualified
specialist workshop.