check engine MERCEDES-BENZ SL ROADSTER 2016 Service Manual

Fuse box in the engine compartment
i Observe the "Important safety notes" sec-
tion (Y page 301). G
WARNING
When the bonnet is open, and the windscreen wipers are set in motion, you can be injured by
the wiper linkage. There is a risk of injury.
Always switch off the windscreen wipers and
the ignition before opening the bonnet. X
Open the bonnet.
X Remove any existing moisture from the fuse
box using a dry cloth.
X To open: open clamps ;.
X Fold cover :of the fuse box up in the direc-
tion of the arrow and remove it. X
To close: check whether the seal is lying cor-
rectly in cover :.
X Insert both openings =at the rear of
cover :into the brackets on the fuse box.
The brackets on the fuse box must be com-
pletely visible in both openings =on the fuse
box.
X Fold down cover :.
X Hook clamps ;into the fuse box and close. X
Close the bonnet. Fuse box in the rear
i Observe the "Important safety notes" sec-
tion (Y page 301). The fuse box in the rear is located on the right-hand
side when viewed in the direction of travel.
X To open: open the seat belt guide on the
right-hand seat and remove the seat belt
(Y page 103).
X Move the right-hand seat as far forward as
possible (Y page 104).
X Insert your fingers at the bottom of front
cover ;between the cover and floor cover-
ing.
X Remove front cover ;by pulling it forward in
the direction of the arrow.
X Lift off top cover :by pulling it in the direc-
tion of the arrow. Fuses
=are accessible through the two open-
ings in the top of the fuse box. 302
Electrical fusesBreakdown assistance

must be positioned vertically, directly under
the jacking point of the vehicle.
Observe the following when raising the vehicle:
R only use the vehicle-specific jack that has
been tested and approved by Mercedes-Benz
to raise the vehicle. If the jack is used incor-
rectly, it could tip over while the vehicle is
raised.
R the jack is designed only to raise and hold the
vehicle for a short time while a wheel is being
changed. It is not permissible to use it to per- form maintenance work under the vehicle.
R avoid changing the wheel on uphill and down-
hill slopes.
R before raising the vehicle, safeguard it from
rolling away by applying the parking brake and
positioning wheel chocks. Do not release the parking brake while the vehicle is raised.
R the jack must be placed on a firm, flat and
non-slip surface. On a loose surface, a large,
flat load-bearing underlay must be used. On a
slippery surface, a non-slip underlay must be
used, e.g. rubber mats.
R do not use wooden blocks or similar objects
as a jack underlay. Otherwise, the jack will not
be able to achieve its load-bearing capacity
due to the restricted height.
R make sure that the distance between the
underside of the tyres and the ground does
not exceed 3 cm.
R never place your hands or feet under the
raised vehicle.
R do not lie under the vehicle.
R do not start the engine when the vehicle is
raised.
R do not open or close a door or the boot lid
when the vehicle is raised.
R make sure that no persons are present in the
vehicle when the vehicle is raised.
Vehicles with light-alloy wheels and hub
caps: the wheel bolts are covered by a hub cap.
Before you can unscrew the wheel bolts, you
must remove the hub cap. Two different variants
can be fitted. X
To remove: take socket;and wheel wrench
= from the vehicle tool kit (Y page 288).
X Position socket ;on hub cap :.
X Position wheel wrench =on socket ;.
X Using wheel wrench =, turn hub cap:anti-
clockwise and remove it.
X To fit: before fitting, check hub cap :and
the wheel area for dirt and clean if necessary.
X Put hub cap :in position and turn until it is in
the right position.
X Position socket ;on hub cap :.
X Attach wheel wrench =to socket ;and
tighten hub cap :.
The tightening torque must be 25 Nm.
i Note
that the hub cap should be tightened
to the specified torque of 25 Nm. Mercedes-
Benz recommends that you have the hub cap
fitted at a qualified specialist workshop. X
Using wheel wrench =, loosen the bolts on
the wheel you wish to change by about one
full turn. Do not unscrew the bolts completely. 314
Changing a wheelWheels and tyres

!
Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine.
Further information on coolants can be found in the Mercedes-Benz Specifications for Ser-
vice Products, MB Specifications for Service
Products 310.1, e.g. on the Internet at
http://bevo.mercedes-benz.com. Or contact
a qualified specialist workshop.
! Always use a suitable coolant mixture, even
in countries where high temperatures prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
i Have the coolant regularly replaced at a
qualified specialist workshop and the replace- ment confirmed in the Service Booklet.
Comply with the important safety precautions
for service products when handling coolant
(Y page 322).
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It is responsible for
the following:
R anti-corrosion protection
R antifreeze protection
R raising the boiling point
If antifreeze/corrosion inhibitor is present in the
correct concentration, the boiling point of the
coolant during operation will be approximately
130 †.
The antifreeze/corrosion inhibitor concentra-
tion in the engine cooling system should:
R be at least 50%. This will protect the engine
cooling system against freezing down to
approximately -37 †.
R not exceed 55% (antifreeze protection down
to -45 †). Heat will otherwise not be dissipa-
ted as effectively.
If the vehicle has lost coolant, top it up with
equal amounts of water and antifreeze/corro-
sion inhibitor.
Mercedes-Benz recommends an antifreeze/
corrosion inhibitor concentrate in accordance
with MB Specifications for Service Products
310.1.
i When the vehicle is first delivered, it is filled
with a coolant mixture that ensures adequate
antifreeze and corrosion protection. i
The coolant is checked at every mainte-
nance interval at a qualified specialist work-
shop. Windscreen washer system
Important safety notes G
WARNING
If windscreen washer concentrate comes into contact with hot components of the engine or
the exhaust system, it can ignite. There is a
risk of fire and injury.
Make sure the windscreen washer concen-
trate does not come into contact with the filler neck.
! Only use washer fluid that is suitable for
plastic lamp lenses, e.g. MB SummerFit or MB
WinterFit. Unsuitable washer fluid could dam-
age the plastic lenses of the headlamps.
! Only the washer fluids SummerFit and Win-
terFit can be mixed. Otherwise, the spraying
nozzles could become blocked.
Do not use distilled or de-ionised water. Other-
wise, the level sensor may give a false reading.
When handling washer fluid, observe the impor- tant safety notes on service products
(Y page 322).
At temperatures above freezing:
X Fill the washer fluid reservoir with a mixture of
water and washer fluid, e.g. MB SummerFit.
X Mix 1 part MB SummerFit to 100 parts water.
At temperatures below freezing:
X Fill the washer fluid reservoir with a mixture of
water and washer fluid, e.g. MB WinterFit.
For the correct mixing ratio refer to the infor- mation on the antifreeze reservoir.
i Add washer fluid concentrate, e.g. MB Sum-
merFit or MB WinterFit, to the washer fluid all
year round. 326
Service products and capacitiesTechnical data