Mercedes-Benz 450 SL 1980, Owner'S Manual

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Checking Fuels Coolants Lubricants etc.
Engine Oil Level Check
1 Dipstick
2 Oil fille r hole
Check engine oil level at regular
intervals, e. g. after refueling, with
the engine at operating tem perature
and shut off.
The vehicle should be
parked on level ground
and the oil level must be
somewhere between the
lower and the upper mark
on dipstick (
1
); do not
replenish in excess of the
upper mark.
For viscosity and capacity, see
“ Fuels, Coolants, Lubricants, etc.,
and last page” .
Replenishing Coolant
1 Coolant Filler
2 Marking for coolant level
The coolant reservoir with fille r
neck is arranged away from the
radiator. To replenish coolant, the
car must be on level ground.
Do not remove pressure cap on
coolant reservoir if engine tem ­
perature is above 90° C /194° F.
A llow engine to cool down before
removing cap. The coolant reser­
v o ir contains hot w ater and is under
pressure.
First turn cap to firs t notch to
relieve excess pressure using a rag.
If opened immediately, hot scalding
fluid and steam w ill be blown out
under pressure.
Add cold w ater only if engine is run­
ning. Both hot and cold engines can
be readily filled up with hot water
(see also “ fuels, coolants, lubri­
cants, e tc .” , page 75).
If a small amount of coolant has to
be added (due to evaporation of
w ater), plain w ater can be added.
If a larger quantity of coolant has to
be added, a 50/50 m ixture of water
and antifreeze should be used.
The coolant level must reach:
• the mark indicated on the reser­
vo ir when the coolant is cold.
• approxim ately 2 c m / 0.8 in higher
when the coolant is hot.
The drain plugs are situated on the
R-H and L-H engine side and on the
radiator bottom.
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