Fiat Doblo Owner's Handbook Manual page 221

If you put the vehicle through a car
wash, follow these
recommendations:
– remove the aerial from the roof so
it does not get damaged;
– water added to a soapy solution
should be used for washing;
– rinse thoroughly to avoid soap
marks staying on the bodywork or
less visible parts.
39)
Dry the less visible parts with special
care, such as the door frames,
bonnet and the headlight frames,
where water may stagnate more
easily. It is a good idea to leave the
vehicle outdoors for a while after
washing it to give water time to
evaporate.
Do not wash the vehicle after it has
been left in the sun or with the
bonnet hot: this may alter the shine
of the paintwork.
Exterior plastic parts should be
cleaned in the same way as the rest
of the vehicle. Where possible, do
not park the vehicle under trees; the
resinous substances released by
many species give the paint a dull
appearance and increase the
possibility of corrosion.
IMPORTANT Bird droppings should
be washed off immediately and
thoroughly as the acid they contain
is particularly aggressive.
6)
Windows
To clean glasses, use specific
cleaning products. Use clean cloths
to avoid scratching the glass or
damaging the transparency.
IMPORTANT Wipe the inside
surface of the rear window gently
with a cloth in the direction of the
filaments to avoid damaging the
heater coils.
Engine compartment
At the end of each winter,
thoroughly wash the engine
compartment, taking care to avoid
spraying the water jet directly onto
the electronic control units and
the relay/fuse box on the left side of
the engine compartment (driving
direction). Have this operation
performed at a specialised
workshop.
IMPORTANT The washing should
take place with the engine cold and
the ignition key in the STOP
position. After the washing
operation, make sure that the
various protections (e.g. rubber
caps and guards) have not been
removed or damaged.
Headlights
IMPORTANT Never use aromatic
substances (e.g. petrol) or ketones
(e.g. acetone) for cleaning the
plastic lenses of the front headlights.
217