General notes -> Mercedes me App for Your Mercedes C Class 4 Door 2023

General notes  
84  
Speeding up activation  
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WARNING Risk of accident or injury due  
to improper modifications to electronic  
components  
WARNING Risk of fire due to flammable  
material coming into contact with hot  
parts of the exhaust system  
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Switch the vehicle off and lock it.  
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Unlock the vehicle aꢀer about two minutes  
and switch on the vehicle.  
Modifications to electronic components, their  
soꢀware or wiring can impair their functional-  
ity and/or the functionality of other networked  
components or safety-relevant systems.  
If combustible materials, e.g. leaves, grass or  
twigs, come into contact with hot parts of the  
exhaust system, they may ignite.  
The on-demand feature has been activated.  
For some features, a notification also appears  
in the vehicle's multimedia system.  
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When driving off-road or on unpaved sur-  
This can endanger the vehicle's operating  
safety.  
faces, check the underside of the vehicle  
at regular intervals.  
If the activation was not successful, repeat the  
process.  
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You must not tamper with wiring, elec-  
tronic components, or their soꢀware.  
In particular, remove any trapped parts  
of plants or other flammable material.  
Operating safety  
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Always have work on electrical and elec-  
If damage should occur, immediately  
inform a qualified specialist workshop.  
tronic devices carried out at a qualified  
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WARNING Risk of accident due to mal-  
functions or system failures  
specialist workshop.  
If you do not have the prescribed service/  
maintenance work or any required repairs car-  
ried out, this could result in malfunctions or  
system failures.  
If you modify the on-board electronics, the gen-  
eral operating permit is rendered invalid.  
Observe the "On-board electronics" section in  
"Technical data".  
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Always have the prescribed service‑ and  
maintenance work or any required  
repairs carried out in a qualified work-  
shop.  
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General notes  
85  
ignite if they come into contact with hot parts  
of the exhaust system.  
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DANGER Risk of death and fire due to  
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NOTE Damage to the vehicle due to driv-  
ing too fast and due to impacts to the  
vehicle underbody or suspension compo-  
nents  
modified and/or damaged components of  
the high-voltage on-board electrical sys-  
tem  
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Have the vehicle checked and repaired  
immediately at a qualified specialist  
workshop.  
The vehicle's high-voltage on-board electrical  
system is under high voltage. If you modify  
component parts in the vehicle's high-voltage  
on-board electrical system or touch damaged  
component parts, you may be electrocuted. In  
addition, modified and/or damaged compo-  
nents may cause a fire.  
In the event of an accident or impact to the  
vehicle underbody, components of the high-  
voltage electrical system may be damaged  
although the damage is not visible.  
In the following situations, in particular, there  
is a risk of damage to the vehicle:  
or  
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R
the vehicle becomes grounded, e.g. on a  
high kerb or an unpaved road  
the vehicle is driven too fast over an obsta-  
cle, e.g. a kerb, speed bump or pothole  
a heavy object strikes the underbody or  
suspension components  
If driving safety is impaired while con-  
tinuing your journey, pull over and stop  
the vehicle immediately, while paying  
attention to road and traffic conditions,  
and contact a qualified specialist work-  
shop.  
R
R
Plug-in hybrid  
In situations such as these, damage to the  
body, underbody, suspension components,  
wheels or tyres may not be visible. Compo-  
nents damaged in this way can unexpectedly  
fail or, in the case of an accident, may no lon-  
ger absorb the resulting force as intended.  
If the underbody panelling is damaged, flam-  
mable materials such as leaves, grass or twigs  
can collect between the underbody and the  
underbody panelling. These materials may  
Hybrid vehicles have an internal-combustion  
engine and at least one electric motor. The energy  
supply for operating the vehicle electrically is pro-  
vided by the high-voltage on-board electrical sys-  
tem.  
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Never make any modifications to the  
high-voltage on-board electrical system.  
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Do not switch on or use the vehicle if its  
high-voltage on-board electrical system  
components have been modified or dam-  
aged.  
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General notes  
86  
vehicles with hybrid systems generate significantly  
less noise than vehicles with internal-combustion  
engines.  
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Never touch damaged components of  
the high-voltage on-board electrical sys-  
tem.  
When you are driving in electric mode, the vehicle  
may not be heard by other road users due to the  
significantly lower noise generated.  
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Aꢀer an accident, do not touch any com-  
ponents of the high-voltage on-board  
electrical system.  
For this reason the vehicle is equipped with a  
sound generator, which serves as an acoustic  
vehicle alerting system (AVAS). This protective  
equipment is prescribed by law.  
The outside sound produced by the sound genera-  
tor (AVAS) can be heard in the passenger com-  
partment at low speeds and does not represent a  
malfunction.  
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Aꢀer an accident, have the vehicle trans-  
ported away.  
Have the components of the high-voltage  
on-board electrical system checked at a  
qualified specialist workshop and  
replaced if necessary.  
Example  
High-voltage components that can become very  
hot are marked with an additional warning sticker:  
The components of the vehicle's high-voltage on-  
board electrical system are marked with yellow  
warning stickers. The cables of the high-voltage  
on-board electrical system are orange.  
Vehicles with a 48 V on-board electrical system  
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DANGER Risk of fatal injury by touching  
damaged high-voltage components  
Vehicles with a 48 V on-board electrical sys-  
tem contain individual high-voltage compo-  
nents. These high-voltage components are  
under high voltage.  
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General notes  
87  
If you modify component parts of these high-  
voltage components or touch damaged com-  
ponent parts, you may be electrocuted.  
High voltage components may be damaged in  
an accident, although the damage may not be  
visible.  
eras or driving and safety systems may mal-  
function or fail.  
Observe the following points when assembling  
the licence plate on the front licence plate  
holder:  
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Assemble the licence plate directly on  
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Never perform modifications to compo-  
nent parts of high-voltage components.  
the licence plate holder without advertis-  
ing media or other holders.  
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Never touch damaged component parts  
Assemble the licence plate so that it  
does not protrude above or to the side of  
the licence plate adapter.  
of high-voltage components.  
Example  
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Never touch component parts of high-  
voltage components aꢀer an accident.  
All work on high voltage components must be car-  
ried out in a qualified specialist workshop.  
Declarations of conformity and notes on driving  
Vehicles with a 48 V on-board electrical system  
contain high-voltage components. These compo-  
nents are marked with a high-voltage label:  
in different countries  
Notes on assembling the number plate on the  
front licence plate holder  
Electromagnetic compatibility  
The electromagnetic compatibility of the vehicle  
components has been checked and certified  
according to the currently valid version of Regula-  
tion UN-R 10.  
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NOTE Malfunctions and system failures  
due to incorrect assembly of the licence  
plate on the front licence plate holder  
If the licence plate is incorrectly assembled on  
the front licence plate holder, sensors, cam-  
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