Mercedes-Benz A Series Owner's Manual page 301

Technical data
Service products and capacities
be at least 50%. This will protect the cooling
R
system against freezing down to around –
37 °C.
not exceed 55% concentration (antifreeze
R
protection down to –45 °C); otherwise,
heat will not be effectively dissipated.
If the vehicle has lost coolant, top it up with
equal amounts of water and antifreeze/cor-
rosion inhibitor. Mercedes-Benz recom-
mends an antifreeze/corrosion inhibitor
which has been approved for Mercedes-Benz.
!
The cooling system contains a filling
which must be renewed after 15 years, or
after 250, 000 km at the latest.
The warranty is only valid if you top up with
an antifreeze/corrosion inhibitor which
has been approved by Mercedes-Benz, and
observe the recommended mixing ratios.
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