Engine compartment
Bonnet
 | Risk of accident |
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Do not pull the release lever while the vehicle is in motion. The bonnet could otherwise open.
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Opening
| Risk of injury |
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There is a risk of injury if the bonnet is open, even if the engine is not running.
Some engine components can become very hot.
To avoid the risk of burns, only touch those components described in the Owner’s Manual and observe the relevant safety notes.
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| Risk of injury |
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The radiator fan between the radiator and the engine can start automatically, even if the key has been removed from the ignition lock. For this reason you must not reach into the turning area of the fan. You could otherwise sustain an injury.
Vehicles with a petrol engine:
The electronic ignition system uses high voltage. For this reason you must never touch components of the ignition system (ignition coil, ignition cable, spark plug connector or test socket) when:
Vehicles with a diesel engine:
The electronic injection control uses high voltage. Therefore, never touch fuel injection system components when:
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Make sure that the windscreen wipers are switched off.
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| Risk of injury |
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The windscreen wipers and wiper linkage could be set in motion.
When the bonnet is open, you or others could be injured by the wiper linkage.
Make sure that the windscreen wipers are switched off and that the key has been pulled out of the ignition lock before opening the bonnet.
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 | Bonnet release lever |
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Pull release lever .
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The bonnet is released.
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Make sure that the windscreen wipers are not folded away from the windscreen. You could otherwise damage the windscreen wipers or the bonnet.
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 | Bonnet catch handle |
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Reach into the gap, pull bonnet catch handle up and lift the bonnet.
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Closing
| Risk of injury |
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Make sure that nobody can become trapped as you close the bonnet.
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Lower the bonnet and let it fall from a height of approximately 20 cm. The bonnet engages into place.
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Engine oil
Depending on how it is driven,
the vehicle consumes a maximum of 0.8 l oil per 1,000 km. The oil
consumption may be higher than this when the vehicle is new or if you
frequently drive at high engine speeds. You can only estimate the oil
consumption after you have driven a considerable distance.
You will find
further information about engine oil in the "Technical data" section
more.
Checking the engine oil
level
To do so:
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the vehicle should be parked on
level ground
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the engine should be switched off
for at least five minutes if the engine was at normal operating
temperature
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the engine should be switched off
for at least 30 minutes if the engine was not at operating temperature (i.e. if
you only started the engine briefly)
Using
the oil dipstick
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| Oil dipstick |
| Upper mark |
 | Lower
mark |
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Example
of a vehicle with a petrol engine (CLS 350)
Topping up the engine oil
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| Cover |
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Example
of a vehicle with a petrol engine (CLS 350)
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| Cover |
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Example
of a vehicle with a diesel engine (CLS 320 CDI)
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Unscrew cap
and remove
it.
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Top up by the amount of oil
required.
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Do not add too much oil. If too much oil is added, there is a risk of damage to the engine or the catalytic converter.
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Screw cap
onto the filler
neck.
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 | Environmental note |
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When topping up the oil, take care not to spill any. Oil must not be allowed to escape into the soil or waterways. You would otherwise be damaging the environment.
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Windscreen washer system/headlamp cleaning system*
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| Cover |
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Add windscreen washer concentrate to the washer fluid all year round.
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| Risk of fire |
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Windscreen washer concentrate is highly flammable. Fire, naked flames and smoking are prohibited when windscreen washer concentrate is being handled.
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Use
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a windscreen washer fluid additive such as MB Summerwash to prevent smearing (for temperatures above freezing).
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a windscreen washer fluid additive with antifreeze properties such as MB Winterwash (if there is a risk of frost).
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Mix the windscreen washer fluid in a container beforehand. Adapt the mixing ratio to the outside temperatures.
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Only use windscreen washer fluid which is suitable for plastic lamp lenses. Unsuitable windscreen washer fluid could damage the plastic lamp lenses of the headlamps.
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