octane MERCEDES-BENZ C-CLASS CABRIOLET 2018 Owner's Manual

vehicle occupants while driving and this
defect has already been repaired at least
twice and Mercedes-Benz, LLC has been
informed in writing of the necessity of a
repair.
(2) the defect or malfunction, though less seri- ous than (1) above, has already been
repaired at least four times and Mercedes-
Benz has been informed in writing of the
necessity of a repair.
(3) the vehicle cannot be used for longer than 30 calendar days because of repair work
resulting from this or other substantial
defects or malfunctions.
Please send your written notice to:
Mercedes-Benz USA, LLC
Customer Assistance Center
3 Mercedes Drive
Montvale, NJ 07645-0350
Maintenance
Always bring the Maintenance Booklet with you when taking the vehicle to an authorized
Mercedes-Benz Center. Your customer service
advisor will enter every service into your Main-
tenance Booklet on your behalf.
Roadside Assistance
The Mercedes-Benz Roadside Assistance Pro-
gram offers technical help in the event of a
breakdown. Calls to the toll-free Roadside Assis-
tance Hotline are answered by our agents 24
hours a day, 365 days a year.
1-800-FOR-MERCedes (1-800-367-6372)
(USA)
1-800-387-0100 (Canada)
For additional information, refer to the
Mercedes-Benz Roadside Assistance Program
brochure (USA) or the "Roadside Assistance"
section in the Service and Warranty Booklet
(Canada). You will find both in the vehicle docu-
ment wallet.
Change of address or change of own-
ership
In the event of a change of address, please sendus the "Notification of Address Change" in the Service and Warranty Booklet or simply call the
Mercedes-Benz Customer Assistance Center
(USA) at the hotline number
1-800-FOR-MERCedes (1-800-367-6372) or
Customer Service Center (Canada) at
1-800-387-0100. This will assist us in contact-
ing you in a timely manner should the need arise.
If you sell your Mercedes, please leave all liter-
ature in the vehicle so that it is available to the
next owner.
If you have purchased a used car, please send us
the "Notification of Used Car Purchase" in the
Service and Warranty Booklet or simply call the
Mercedes-Benz Customer Assistance Center
(USA) at the hotline number
1-800-FOR-MERCedes (1-800-367-6372) or
Customer Service (Canada) at 1-800-387-0100.
Vehicle operation outside the USA
and Canada
When you are abroad with your vehicle, observe
the following points:
RService facilities or replacement parts may
not be readily available.
RLead-free fuel for vehicles with a catalytic
converter may not be available. Leaded fuel
can cause damage to the catalytic converter.
RThe fuel may have a considerably lower
octane number. Unsuitable fuel can cause
engine damage.
Some Mercedes-Benz models are available for
delivery in Europe through our European Deliv-
ery Program. For details, consult an authorized
Mercedes-Benz Center or write to one of the
following addresses.
In the USA
Mercedes-Benz USA, LLC
European Delivery Department
One Mercedes Drive
Montvale, NJ 07645-0350
In Canada
Mercedes-Benz Canada, Inc.
European Delivery Department
98 Vanderhoof Avenue
Toronto, Ontario M4G 4C9
Service and vehicle operation29
Introduction
Z

mium-grade unleaded gasoline as soon as
possible.
RDo not drive at the maximum speed.
RAvoid sudden acceleration and engine
speeds over 3,000 rpm.
You will usually find information about the fuel
grade on the fuel pump. If you cannot find the
label on the fuel pump, ask the gas station staff.
iFor further information, consult a qualified
specialist workshop or visit
http://www.mbusa.com (USA only).
As a temporary measure, if the recommended
fuel is not available, you may also use regular
unleaded gasoline with an octane rating of
87 AKI/91 RON. This may reduce engine per-
formance and increase fuel consumption. Avoid
driving at full throttle and sudden acceleration.
Never refuel using gasoline with a lower AKI.
Information on refueling (
Ypage 142).
Additives
!Operating the engine with fuel additives
added later can lead to engine failure. Do not
mix fuel additives with fuel. This does not
include additives for the removal and preven-
tion of residue buildup. gasoline must only be mixed with additives recommended by
Mercedes-Benz. Comply with the instructions
for use on the product label. More information
about recommended additives can be
obtained from any authorized Mercedes-Benz Center.
Mercedes-Benz recommends that you use bran-
ded fuels that have additives.
The fuel quality available in some countries may
not be sufficient. Residue could build up in the
fuel injection system as a result. In such cases,
and in consultation with an authorized
Mercedes-Benz Center, the fuel may be mixed
with the cleaning additive recommended by
Mercedes-Benz. You must observe the notes
and mixing ratios specified on the container.
Engine oil
General notes
!Do not use engine oil or an oil filter with
specifications deviating from those expressly
required for the prescribed service intervals.
Do not change the engine oil or oil filter in
order to set replacement intervals longer than those prescribed. This could otherwise cause
damage to the engine or exhaust gas after-
treatment.
Follow the instructions on the service interval
display for changing the engine oil. This could
otherwise cause damage to the engine or
exhaust gas aftertreatment.
When handling engine oil, observe the important
safety notes on service products (
Ypage 340).
The engine oils are matched to the performance
of Mercedes-Benz engines and service intervals.
You should therefore only use engine oils and oil
filters that are approved for vehicles with main- tenance systems.
For a list of approved engine oils and oil filters,
consult an authorized Mercedes-Benz Center.
Or visit the website
http://bevo.mercedes-benz.com.
The table shows which engine oils have been
approved for your vehicle.
ModelMB-Freigabe or MB-Approval
All models229.5, 229.6
Use only SAE 0W-40 or SAE 5W-40 engine oils
for Mercedes-AMG vehicles.
iMB approval is indicated on the oil contain-
ers.
342Service products and filling capacities
Technical data