2020 Mercedes-Benz A-CLASS SEDAN Technical Data User Guide

The Mercedes-Benz A-Class Sedan 2020 welcomes you to the world of luxury and performance, where innovation meets elegance. You will learn about the remarkable technological details that go into making this car a true work of art on wheels in this introduction. The 2020 A-Class Sedan offers an enjoyable driving experience thanks to a variety of strong and effective engines. Every option, from the powerful yet fuel-efficient turbocharged four-cylinder engines to the high-performance AMG variations, is designed to provide exceptional performance and comfort on the road. To ensure smooth power delivery, Mercedes-Benz combined the engines with cutting-edge gearbox systems. You can get either 7-speed dual-clutch automatic or 8-speed automatic transmissions, which enable rapid gear changes and fine control, depending on the model.

Notes on technical data

Mercedes-AMG vehicles: be sure to observe the notes in the Supplement. Otherwise, you may fail to recognize dangers.
The data stated only applies to vehicles with standard equipment. You can obtain further information from an authorized Mercedes-Benz Center.

Vehicle electronics

Two-way radios
Notes on installing two-way radios

WARNING
Risk of accident due to improper work on two-way radios
The electromagnetic radiation from two-way radios can interfere with the onboard electronics if RF transmitters are manipulated or retrofitted incorrectly.

This could jeopardize the operating safety of the vehicle.
You should have all work on electrical and electronic components carried out at a qualified specialist workshop.

WARNING
Risk of accident from incorrect operation of two-way radios
If you operate two-way radios incorrectly in the vehicle, the electromagnetic radiation could interfere with the on-board electronics, e.g.:

1. if the two-way radio is not connected to an exterior antenna
2. if the exterior antenna is not correctly mounted or is not of low reflection
   This could jeopardize the operating safety of the vehicle.
3. Have the low-reflection exterior antenna installed at a qualified special‐ist workshop?
4. When operating two-way radios in the vehicle, always connect them to the low-reflection exterior antenna.

NOTE
Invalidation of the operating permit due to failure to comply with the instructions for installation and use
The operating permit may be invalidated if the instructions for the installation and use of two-way radios are not observed.

1. Only use approved frequency bands.
2. Observe the maximum permissible output power in these frequency bands.
3. Only use approved antenna positions.

1. Front roof area
2. Rear roof area
3. Rear fenders
4. Trunk lid

On vehicles with a panoramic sliding sunroof, installing an antenna to the front or rear roof area is not permitted. On the rear fenders, it is recommended that you install the antenna on the side of the vehicle closest to the center of the road. Use Technical Specification ISO/TS 21609 (Road Vehicles – “EMCs for installation of aftermarket radio frequency transmitting equipment”) when retrofitting two-way radios. Comply with the legal requirements for detachable parts. If your vehicle has installations for two-way radio equipment, use the power supply and antenna connectors provided in the pre-installation. Be sure to observe the manufacturer’s supplements when installing.

Two-way radio transmission output
The maximum transmission output (PEAK) at the base of the antenna must not exceed the values in the following table.

Frequency band and maximum transmission output

Frequency band	Maximum transmis‐ sion output
Short wave 3 – 54 MHz	(100 W)
4 m frequency band 74 – 88 MHz	(30 W)
2 m frequency band 144 – 174 MHz	(50 W)
trunked radio sys‐ tem/Tetra   380 – 460 MHz	(10 W)
70 cm frequency band   420 – 450 MHz	(35 W)
Two-way radio (2G/3G/4G)	(10 W)

The following can be used in the vehicle without restrictions:

1. Two-way radios with a maximum transmission output of up to 100 mW
2. RF transmitters with transmitter frequencies in the 380 – 410 MHz frequency band and a maximum transmission output of up to 2 W (trunked radio system/Tetra)
3. Mobile phones (2G/3G/4G)

There are no restrictions when positioning the antenna on the outside of the vehicle for some wavebands.

This applies to the following wavebands:

1. Trunked radio system/Tetra
2. 70 cm frequency band
3. 2G/3G/4G

Vehicle identification plate, VIN, and engine number overview

Vehicle identification plate

Vehicle identification plate (USA only)

1. Permissible gross weight
2. Maximum permissible front axle load
3. Maximum permissible rear axle load
4. Paint code
5. VIN (vehicle identification number)

Vehicle identification plate (Canada only)

1. Permissible gross weight
2. Maximum permissible front axle load
3. Maximum permissible rear axle load
4. Paint code
5. VIN (vehicle identification number)

The maximum permissible gross vehicle weight is made up of the vehicle weight, all vehicle occupants, the fuel and the load. The maximum gross axle weight rating is the maximum weight that can be carried on one axle (front or rear axle). Do not exceed the maximum permissible gross vehicle weight or the maximum gross axle weight rating for the front or rear axle.

VIN, engine number and other signs

1. Engine number stamped into the crankcase
2. VIN (vehicle identification number) stamped into the crossmember
3. Plate with information about emissions testing, including confirmation of emissions guidelines at the U.S. federal level as well as for California
4. VIN as a label at the lower edge of the windshield

Operating fluids

Notes on operating fluids
Mercedes-AMG vehicles: be sure to observe the notes in the Supplement. Otherwise, you may fail to recognize dangers.

WARNING
Risk of injury from operating fluids harmful to your health
Operating fluids may be poisonous and harm‐ful to your health.

1. Observe the text on the original con‐tainers when using, storing or disposing of operating fluids.
2. Always store operating fluids sealed in their original containers.
3. Always keep children away from operating fluids.

ENVIRONMENTAL NOTE
Environmental pollution caused by environmentally irre‐sponsible disposal
Dispose of operating fluids in an environmentally responsible manner.

Operating fluids include the following:

1. Fuels
2. Lubricants
3. Coolant
4. Brake fluid
5. Windshield washer fluid
6. Climate control system refrigerant

Only use products approved by Mercedes-Benz. Damage caused by the use of products that have not been approved is not covered by the Mercedes-Benz warranty or goodwill gestures.

You can identify operating fluids approved by Mercedes-Benz by the following inscriptions on the container:

1. MB-Freigabe (e.g. MB-Freigabe 229.51)
2. MB-Approval (e.g. MB-Approval 229.51)

Further information on approved operating fluids is available at the following locations:

1. In the Mercedes-Benz Specifications for Operating Fluids by entering the designation
   1. At https://bevo.mercedes-benz.com
   2. In the Mercedes-Benz BeVo app
2. At a qualified specialist workshop

WARNING
Risk of fire or explosion from fuel

Fuels are highly flammable.

1. Fire, open flames, smoking and the creation of sparks must be avoided.
2. Switch off the ignition and, if available, the stationary heater, before and while refueling the vehicle.

WARNING
Risk of injury from fuels
Fuels are poisonous and hazardous to your health.

1. Do not swallow fuel or let it come into contact with skin, eyes or clothing.
2. Do not inhale fuel vapor.
3. Keep children away from fuel.
4. Keep doors and windows closed during the refueling process.

If you or other people come into contact with fuel, observe the following:

1. Immediately rinse fuel off your skin with soap and water.
2. If fuel comes into contact with your eyes, immediately rinse them thor‐oughly with clean water. Seek medical attention immediately.
3. If you swallow fuel, seek medical atten‐tion immediately. Do not induce vomit‐ing.
4. Change immediately out of clothing that has come into contact with fuel.

Fuel
Notes on fuel grades for vehicles with a gas‐oline engine
Observe the notes on operating fluids.

NOTE
Damage caused by the wrong fuel
Even small amounts of the wrong fuel could result in damage to the fuel system, the engine and the emission control system.

1. Only refuel with low-sulfur unleaded fuel.

This fuel may contain up to 10% ethanol by volume. Your vehicle is suitable for use with E10 fuel.

Never refuel with one of the following fuels:

1. Diesel
2. Gasoline with more than 10% ethanol by volume, e.g. E15, E85, E100
3. Gasoline with more than 3% methanol by volume, e.g. M15, M30, M85, M100
4. Gasoline with additives containing metal
   If you have accidentally refueled with the wrong fuel:
5. Do not switch the ignition on.
6. Consult a qualified specialist workshop.

If the available fuel is not sufficiently low in sul‐fur, this can produce unpleasant odors.
Only refuel with fuel that has at least the octane number specified in the instruction label in the fuel filler flap.

If you want maximum engine output:
only refuel with unleaded premium grade gasoline with an octane number of at least 91 AKI/ 95 RON.
As a temporary measure, if the recommended fuel is not available, you may also refuel with unleaded regular gasoline with at least 87 AKI/91 RON. This may reduce engine output and increase fuel consumption.
Never refuel using gasoline with an even lower RON.

NOTE
Premature wear through unleaded regular gasoline
Unleaded regular gasoline can cause the engine to wear more quickly and impair lon‐gevity and performance.

If unleaded premium grade gasoline is unavailable and you have to refuel using unleaded regular gasoline:

1. Only fill the fuel tank to half full with unleaded regular gasoline and fill up as soon as possible with unleaded pre‐mium grade gasoline.
2. Do not drive at the maximum design speed.
3. Avoid sudden acceleration and engine speeds over 3000 rpm.

Further information on fuel is available at the fol‐lowing locations:

1. At a gas station
2. At a qualified specialist workshop
3. On the https://www.mbusa.com (USA only)
   Information on additives in gasoline Observe the notes on operating fluids.

NOTE
Damage from use of unsuitable additives
Even small amounts of the wrong additive may lead to malfunctions occurring.

1. Only add cleaning additives recommended by Mercedes-Benz to the fuel.

Mercedes-Benz recommends that you use fuel brands that have additives.
In some countries, the fuel available may not have sufficient additives. Residue could build up in the fuel injection system as a result. In this case, in consultation with an authorized Mercedes-Benz Center, the fuel may be mixed with the cleaning additive recommended by Mercedes-Benz. Be sure to observe the notes and mixing ratios specified on the container.

Tank content and fuel reserve

Capacity

Model                               Total capacity
All models	13.5 gal (51.0 liters)
Model                             of which reserve fuel
All models	1.3 gal (5.0 liters)

Engine oil
Notes on engine oil
Observe the notes on operating fluids.

NOTE
Engine damage caused by an incorrect oil filter, incorrect oil or additives

1. Do not use engine oils or oil filters other than those which meet the specifications necessary for the prescribed service intervals.
2. Do not alter the engine oil or oil filter in order to achieve longer change intervals than prescribed.
3. Do not use additives.
4. Have the engine oil changed after the prescribed intervals.

Mercedes-Benz recommends that you have the oil change carried out at a qualified specialist workshop.

Further information on engine oil and oil filters is available at the following locations:

1. In the Mercedes-Benz Specifications for Operating Fluids by entering the designation
   1. At https://bevo.mercedes-benz.com
   2. In the Mercedes-Benz BeVo app
2. At a qualified specialist workshop

Quality and capacity of engine oil MB-Freigabe or MB-Approval

Gasoline engines	Engine oil specifica‐ tions
All models	229.51, 229.52,   229.61
	229.71*

* Recommended for lowest possible fuel consumption (lowest SAE viscosity class in each case; observe possible restrictions of the approved SAE viscosity classes). To achieve the lowest possible fuel consumption, it is recommended to use the engine oil specifications marked in the table for the lowest SAE viscosity class. Possible restrictions of the approved SAE viscosity classes must be observed.
The following values refer to an oil change, including the oil filter.

Capacity

Model                                   Capacity
All models	5.8 US qt (5.5 liters)

Notes on brake fluid
Observe the notes on operating fluids.

WARNING
Risk of an accident due to vapor pockets forming in the brake system

The brake fluid constantly absorbs moisture from the air. This lowers the boiling point of the brake fluid. If the boiling point is too low, vapor pockets may form in the brake system when the brakes are applied hard. This causes the braking effect to be impaired. Have the brake fluid renewed at the specified intervals. Have the brake fluid regularly replaced at a qualified specialist workshop.
Only use brake fluid approved by Mercedes-Benz according to MB-Freigabe or MB-Approval 331.0.

You can obtain further information on brake fluid in the following places:

1. In the Mercedes-Benz Specifications for Operating Fluids
   1. At https://bevo.mercedes-benz.com
   2. In the Mercedes-Benz BeVo app
2. At a qualified specialist workshop

Coolant
Notes on coolant
Observe the notes on operating fluids.

WARNING
Risk of fire and injury from antifreeze
If antifreeze comes into contact with hot component parts in the engine compart‐ment, it may ignite.

1. Allow the engine to cool down before adding antifreeze.
2. Make sure that no antifreeze spills out next to the filler opening.
3. Thoroughly clean off any antifreeze from component parts before starting the vehicle.

NOTE
Damage caused by incorrect coolant
Only add coolant that has been pre‐ mixed with the required antifreeze pro‐tection.

Information on coolant is available at the fol‐lowing locations:

1. In the Mercedes-Benz Specifications for Operating Fluids 310.1:
   1. At https://bevo.mercedes-benz.com
   2. In the Mercedes-Benz BeVo app
2. At a qualified specialist workshop

NOTE
Overheating at high outside temperatures
If an inappropriate coolant is used, the engine cooling system is not sufficiently pro‐tected against overheating and corrosion at high outside temperatures.

1. Always use coolant approved by Mercedes-Benz.
2. Observe the instructions in the Mercedes-Benz Specifications for Oper‐ating Fluids 310.1.

Have the coolant regularly replaced at a qualified specialist workshop.
The proportion of corrosion inhibitor/antifreeze concentrate in the engine cooling system should be:

1. A minimum of 50% (antifreeze protection down to approximately -35 °F (-37 °C))
2. A maximum of 55% (antifreeze protection down to -49 °F (-45 °C))

FAQ

Useful Link

View Full Manual: Mercedes-Benz A-CLASS SEDAN 2020 User Manual
2020 Mercedes-Benz A-CLASS SEDAN Transmission and Refueling User Guide