Mercedes-Benz V12 Biturbo M 279 AMG Service Manual
Introduction of the New V12 Biturbo
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Engine M 279 AMG
Introduction into Service Manual
Mercedes-Benz Service
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Introduction of the New V12 Biturbo Engine
M 279 AMG
Daimler AG · Technical Information and Workshop Equipment (GSP/OR) · D-70546 Stuttgart
Information and copyright
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tal:
© 2012 by Daimler AG
This document, i
Any further processing or use requires the previous written consent of
Daimler AG, Department GSP/ORS, HPC R822, W002, D-70546 Stuttgart.
This applies in particular to reproduction, distribution, alteration, translation,
microfilming and storage and/or processing in electronic systems, including
databases and online services.
Image no. of title image: P01.10-3109-00
Order no. of this publication: 6516 1392 02 – HLI 000 000 08 01
06/12
cluding all its parts, is protected by copyright.
n
Contents
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Preface 5
Overview
Highlights 6
Engine data comparison: M 275 AMG - M 279 AMG 7
Engine views 9
Maintenance
ASSYST 15
Mechanical components
Crankcase 16
Oil pan 20
Crank assembly 21
Cylinder head 22
Belt drive 24
Combustion
Charging 25
Fuel system 31
Exhaust system 36
Introduction of the New V12 Biturbo Engine, M 279 AMG
3b
Contents
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Cooling and lubrication
Engine cooling 41
Turbocharger cooling 46
Charge air cooling 47
Engine lubrication 49
Electrical and electronic systems
Engine control 52
Ignition system 58
On-board diagnosis 60
Special tools
Electrical/mechanical components 62
Annex
Abbreviations 63
Index 64
4 b
Introduction of the New V12 Biturbo Engine, M 279 AMG
Dear reader,
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Preface
This Introduction into Service manual presents the
new V12 biturbo engine M 279 from Mercedes-AMG in
the vehicle model series 231.
The purpose of this brochure is
the techni
of their market launch. This brochure is intended to
provide information for people employed in service or
maintenance/repair as well as for aftersales staff. It is
assumed that the reader is already familiar with the
engines in the various Mercedes-Benz models
currently on the market.
This Introduction into Service manual is not intended
as an
problems. For such needs, more extensive information
is available in the Workshop Information System (WIS)
and Xentry Diagnostics.
cal highlights of this new engine in advance
aid for repairs or for the diagnosis of technical
to acquaint you with
WIS is updated continuously. Therefore,
the information available there reflects the latest
technical status of our vehicles.
This Introduction into Service manual presents initial
informat
not stored in WIS. The contents of this brochure are
not updated. No provision is made for supplements.
We will publicize modifications and new features
in the relevant WIS documents. The information
presented in thi
may therefore differ from the more up-to-date
information found in WIS.
While this brochure's technical content is valid as of
our publicat
vehicles may incorporate revisions and design
changes based on differing technical specifications.
ion relating to the new engine and, as such, is
s Introduction into Service Manual
ion date in April 2012, actual production
Daimler AG
Technical Information
and Workshop Equipment (GSP/OR)
Introduction of the New V12 Biturbo Engine, M 279 AMG
5b
Highlights
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Overview
In September 2012 Mercedes-AMG will introduce
the new 12-cylinder V-engine M 279 AMG in the
new SL-Class
This advanced V12 engine with the model designation M 279 focuses rigorously on performance and
fuel efficiency in equal measure. It replaces the
su
ccessful unit of engine model M 275
Numerous combustion-related and applicational
optimizations have significantly reduced fuel
consumption and emissions while simu
increasing engine performance. Also helping to
improve emission levels and fuel economy is the
new AMG SPEEDSHIFT PLUS 7G-TRONIC with
second-generation "Controlled Efficiency" start/
stop function including alternator management,
which has been modified to cope with the high
torque of the M 279 AMG.
(model series 231).
.
ltaneously
The main features of the V12 biturbo engine
M 279 AMG in brief:
• Two modified turbochargers with air/water
inter
c
ooling and wastegate valve
• New engine control unit
• New dedicated ignition coils (dual ignition) with
multispa
• Full-aluminum crankcase with pulsation bores
• One-piece chain drive
• Forged crankshaft made of high-quality alloy
steel
• Re-engineered forged pistons
• Roller-type cam followers
• Two intake valves and one exhaust valve per
cylinder
• Hollow-stemmed exhaust valves with sodium
fi
ll
• Low-temperature circuit with expansion
reservoir
rk ignition process
ing
M 279 AMG, V12-cylinder with 6.0 l displacement and biturbo charging
6
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
P01.10-3110-00
Engine data comparison: M 275 AMG - M 279 AMG
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M 275 KE60 LA AMG
M 275.981
Cylinder configuration/angle V12/60°
Rated output
at engine speed
Rated torque
at engine speed
Displacement cm
Bore mm 82.6
Stroke mm 93
Cylinder spacing mm 90
Compression ratio ε 9.0
kW
rpm
Nm
rpm
450
4800-5100
1000
2000-4000
3
5980 5980
M 279 KE60 LA AMG
M 279.981
463
4800-5400
1000
2300-4300
Overview
Connecting rod length mm 142.3
Forced induction 2 turbochargers
Turbocharger control Wastegate
Boost pressure (max.) bar 1.5
Oil change quantity (with filter) l 9.5
Coolant filling capacity
(with heater circuit)
Main circuit
Low-temperature circuit
Fuel type Super Plus 98 RON
Engine weight
DIN 70020 GZ
l
l
kg 246 248
11.8
3.2
11.8
3.5
Emissions regulation
ECE/USA EU5/ULEV EU5+/ULEV II
Introduction of the New V12 Biturbo Engine, M 279 AMG
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7
Engine data comparison: M 275 AMG - M 279 AMG
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Overview
Torque and power curve, M 275 AMG and M 279 AMG
MTorque
wer
PPo
n Engine speed
8
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
P01.00-3353-00
Engine views
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Overview
View of engine from above
1 Air filter housing, right cylinder bank
2 Charge air cooler, right cylinder bank
3 Charge air cooler, left cylinder bank
4 Air filter housing, left cylinder bank
B28/4 Pressure sensor downstream
left cylinder bank
B28/5 Pressure sensor downstream of air fi
right cylinder bank
of air fi
P01.10-3111-00
lter,
lter,
Introduction of the New V12 Biturbo Engine, M 279 AMG
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9
Engine views
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Overview
View of engine from above
A9 Refrigerant compressor
B11/4 Coolant temperature sensor
G2 Alternator
M16/6 Throttle valve actuator
T1/1 Cylinder 1 ignition coil
T1/2 Cylinder 2 ignition coil
T1/3 Cylinder 3 ignition coil
T1/4 Cylinder 4 ignition coil
T1/5 Cylinder 5 ignition coil
T1/6 Cylinder 6 ignition coil
T1/7 Cylinder 7 ignition coil
T1/8 Cylinder 8 ignition coil
T1/9 Cylinder 9 ignition coil
T1/10 Cylinder 10 ignition coil
T1/11 Cylinder 11 ignition coil
T1/12 Cylinder 12 ignition coil
Y32/1 Air pump 1 switchover valve
Y32/2 Air pump 2 switchover valve
Y77/1 Boost pressure control
101 Bypass air switchover valve
Y
pressure transducer
P01.10-3112-00
10
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
Engine views
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Overview
View of engine from above
1 Left air shutoff valve
2 Right air shutoff valve
B17/8 Charge air temperature sensor
B28/7 Pressure sensor downst
B89 Secondary air pressure sensor
M33 Electric air pump
Y62/1 Cylinder 1 injection valve
Y62/2 Cylinder 2 injection valve
Y62/3 Cylinder 3 injection valve
ream
of throttle valve
P01.10-3113-00
Y62/4 Cylinder 4 injection valve
Y62/5 Cylinder 5 injection valve
Y62/6 Cylinder 6 injection valve
Y62/7 Cylinder 7 injection valve
Y62/8 Cylinder 8 injection valve
Y62/9 Cylinder 9 injection valve
Y62/10 Cylinder 10 injection valve
Y62/11 Cylinder 11 injection valve
Y62/12 Cylinder 12 injection valve
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
11
Engine views
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Overview
View of engine from rear
B6/1 Camshaft Hall sensor
28/6 Pressure sensor upstream of thro
ttle valve
P01.10-3114-00
B70 Crankshaft Hall sensor
M1 Starter
12
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
Engine views
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Overview
View of engine from left
1 Blow-off valve
2 Left turbocharger
P01.10-3115-00
A16/1 Knock sensor 1
A16/2 Knock sensor 2
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
13
Engine views
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Overview
View of engine from right
1 Blow-off valve
2 Right turbocharger
P01.10-3116-00
A16/3 Knock sensor 3
A16/4 Knock sensor 4
14
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
New technical features
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ASSYST
The new engine M 279 AMG is being introduced in
the SL-Class. The maintenance intervals remain the
same as for its predecessor engine M 275.
When it is launched in model series 231, two
coolant ci
expansion reservoir.
The interval for the low-temperature circuit is "every
20
0,0
"every 50,000 km/3 years".
rcuits will be installed, each with one
00 km/10 years", and for the main circuit it is
The oil change interval for the 7-speed automatic
ansmission AMG SPEEDSHIFT PLUS 7G-TRONIC
tr
is "every 125,000 km/5 years".
Maintenance
Introduction of the New V12 Biturbo Engine, M 279 AMG
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15
Crankcase
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A die-cast aluminum crankcase with Silitec cylinder
liners is used in the new M 279 AMG.
The bore and cylinder spacing of the M 275 AMG
have been preserved. The compression ratio ε is
9.
0.
crankcase and the timing case contain a
The
number
Mechanical components
various media (pressurized
return
of ducts and lines for carrying the
oil, coolant, air, oil
ducts). The crankcase is a bedplate design
with individual bolt-on main bearing caps made of
cast steel.
i Note
The engine number is impressed in the center of
the bottom of the crankcase (bedplate).
1 Crankcase upper section
2 Crankcase lower section (bedplate)
3Crankcase cover
4 Timing case
16
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
P01.40-2295-00
5 Rear crankcase cover
6 Oil filter
7Oil deflector
8Oil pan
9 Crankshaft bearing cap
Ventilation
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Crankcase
The engine crankcase is ventilated via a centrifugal
oil separator driven by the left camshaft. An integral
pressure regulating valve provides the necessary
pressures inside the crankcase according to the
operating state (partial load or wide open throttle,
natural aspiration or forced induction) and prevents
the occurrence of excessive vacuum in the crankcase.
The centrifugal separator is necessary because of
the high pro
portion of blow-by gases that occurs in
a turbocharged engine. In addition, this system
guarantees reliable oil separation under all operating conditions, even under strong acceleration or
braking,
as well as during fast cornering.
Check valves in the partial-load vent line and in the
full-load vent line ensure that the gases
flow in the
correct direction out of the crankcase.
The partial-load vent line opens into the charge air
distributor; the full-load vent
line ends in the intake
line (damper filter) of the left turbocharger.
i Note
The connection between the full-load vent line and
the left damper
filter is a plug-in connection on the
ECE version and a permanent (bonded) joint on
the USA variant.
Mechanical components
Crankcase ventilation system
1 Centrifugal oil separator
2 Pressure regulating valve
3 Partial-load vent line
4 Partial-load ventilation check valve
Introduction of the New V12 Biturbo Engine, M 279 AMG
5 Charge air distributor
6 Full-load vent line
7 Full-load ventilation check valve
8 Left damper filter
P01.20-2303-00
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17
Crankcase
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CARB – California Air Resources Board
CARB is the clean-air agency of the state of California, which proposes legislation aimed at
preventing air pollution.
Accordi
publish
(CCR), even the crankcase ventilation system of an
Mechanical components
internal
requirements because any break in the hose or pipe
connections of the crankcase ventilation system
could result in increased hydrocarbon emissions.
For this reason all the components of the crankcase
ventilation system must be monitored electronically
by
any
crankcase, the pressure regulating valve and the
damper filter, and to log an appropriate fault code
in the fault memory.
In addition, the driver is alerted by the lighting of the
engine diagno
cluster.
ng to the guidelines of this authority,
ed in the California Code of Regulation
combustion engine must satisfy special
the on-board diagnosis (OBD) in order to detect
break in the hose connections between the
sis indica
tor lamp in the instrument
Engine M 279 AMG satisfies these requirements
with the fol
• The partial-load vent line (items 3 and 4) is
safeguarded by the OBD which detects any
pressure changes
• Inseparable connections are used for the
full-load vent line (items 6 and 7)
• The left damper filter (item 8) is inseparable
connected to the full-load vent line and is also
monitored by the OBD
The item numbers above refer to the illustration on
the preceding page.
lowing measures:
Monitoring by the OBD is not required for inseparable connections and for s
cas
e ventilation systems which contain no hose or
pipe co
nnections.
o-called closed crank-
18
Introduction of the New V12 Biturbo Engine, M 279 AMG
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Crankcase
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Vapors loaded with oil mist coming from the crankcase enter the centrifuge, which rotates at the
same speed as the camshaft. Here th
e vapors are
made to rotate, and the oil particles separate from
the gases and drip back into the crankcase. The
cleaned air flows into the pressure regulator and
depending on the operating state of the engine is
fed either directly into the charge air manifold or
into the intake line of the left turbocharger.
i Note
Even with such efficient oil separation, minute
residual
quantities of oil mist pass through the
separator.
In the case of full-load ventilation, the filtered
are fed into the intake tract upstream of the
gases
left turbocharger. Minute quantities of oil can
cause the compressor impeller of the turbocharger to turn black over time.
This is not a shortcoming or a fault!
Mechanical components
Centrifugal oil separator (radial oil separator)
A Contaminated vapors
B Oil droplets
C Cleaned air
Introduction of the New V12 Biturbo Engine, M 279 AMG
1 Pressure regulating valve
2 Centrifugal oil separator
3 Camshaft sprocket
4 Camshaft
P01.20-2304-00
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