Mercedes-Benz: engine M272, M273. Service manual — part 6

AR01.20-P-5012EL

Remove/install right cylinder head cover

2.3.10

ENGINES

272, 273 (except 272.983) in MODEL 212

P01.20-2127-09

1

Bracket

5r

Right control unit bracket

N3/10

ME-SFI [ME] control unit

1a

Screw

6

Ground cable

Y32

Air pump switchover valve

2

Air shutoff valve

7

Cylinder head cover

3

Front cover

8

Feed duct

L

Left connector

4

Cover

9

Resonance intake manifold

R

Right connector

5l

Left control unit bracket

10

Engine lifting eye

Remove/install

Information on preventing damage to

AH54.00-P-0001-01A

electronic components due to electrostatic
discharge

1

Turn key in ignition lock to position "0"

2

Remove air filter housing

AR09.10-P-1150EWS

3

Remove bolts (1a) and remove bracket (1)

*BA01.30-P-1009-01O

for front engine cover with air pump
switchover valve (Y32)

4

Remove right air shutoff valve (2)

AR14.30-P-7200EW

5

Remove front cover (3) on the right cylinder

AR01.30-P-5700EWR

head

6

Remove ignition coils at right cylinder head

AR15.12-P-2003EW

7

Remove cover (4) on centrifuge

AR01.20-P-2100EWS

8

Disconnect right connector (R) at ME-SFI
[ME] control unit (N3/10)

9

Detach ME-SFI [ME] control unit (N3/10)

Do not disconnect left connector (L) at

from control unit brackets (5l, 5r) and lay to

ME-SFI [ME] control unit (N3/10).

one side

10

Remove right control unit bracket (5r)

*BA07.08-P-1002-01A

11

Detach ground line (6) from cylinder head

*BA01.30-P-1010-01O

cover (7)

12

Remove feed duct (8) from resonance intake

*BA15.18-P-1001-01B

manifold (9), cylinder head cover (7) and
rear right engine lifting eye (10) and place to
one side

*BA15.18-P-1002-01B

*BA15.18-P-1003-01B

13

Loosen bolts for cylinder head cover (7) in

Engine 272

AR01.20-P-5014-03VA

reverse order of tightening procedure and
remove them

Engine 273

AR01.20-P-5014-03SX

*BA01.30-P-1004-01O

Страница 1 из 3

© Daimler AG, 07.04.13, G/07/14, ar01.20-p-5012el, Remove/install right cylinder head cover
ENGINES 272, 273 (except 272.983) in MODEL 212

14

Carefully pry off cylinder head cover (7)

To avoid damaging sealing surfaces, do

from cylinder head

not pound in the prying tool between the
cylinder head cover (7) and the cylinder
head.

Installation:

Apply sealing compound to

cylinder head cover (7):

Notes on sealant path for cylinder head

Engine 272

AH01.30-P-1000-08V

cover

Engine 273

AH01.30-P-1000-08SX

*112589002500

Loctite sealant 5970

*BR00.45-Z-1013-01A

Clean

15

Clean sealing surfaces at cylinder head and

AR01.00-P-0050-01A

Do not use any sharp-edged tools or

at cylinder head cover (7)

abrasive paper as this will damage the
sealing surfaces.
Loctite 7200

*BR00.45-Z-1038-04A

Cleaning spray, Loctite 7063 (150ml)

*BR00.45-Z-1046-04A

16

Install in the reverse order

Checking

Risk of accident

Secure vehicle to prevent it from moving by

Danger!

caused by vehicle starting

AS00.00-Z-0005-01A

off by itself when engine is running. Risk of itself.
injury

Wear closed and snug-fitting work clothes.

caused by contusions and burns

during starting procedure or when working

Do not touch hot or rotating parts.

near the engine as it is running

17

Conduct engine test run and check engine
for leaks whilst it is running

Cylinder head

Number

Designation

Engine

Engine

272

273

Bolt, cylinder head cover to cylinder head

M7

Stage 1

Nm

12

12

BA01.30-P-1004-01O

Stage 2

°

90

90

Bolt, switchover valve bracket to cylinder head

M6

Nm

9

9

BA01.30-P-1009-01O

Bolt, ground line to cylinder head cover

M6

Nm

9

9

BA01.30-P-1010-01O

Control unit

Number

Designation

Engine

Engine

272

273

BA07.08-P-1002-01A

Bolt, control unit bracket to resonance intake manifold

Nm

8

8

Engine wiring harness

Number

Designation

Engine

Engine

272

273

BA15.18-P-1001-01B

Bolt, feed duct to resonance intake manifold

Nm

8

8

BA15.18-P-1002-01B

Bolt, feed duct to cylinder head cover

Nm

8

8

BA15.18-P-1003-01B

Bolt, feed duct to engine lifting eye

Nm

8

8

Страница 2 из 3

© Daimler AG, 07.04.13, G/07/14, ar01.20-p-5012el, Remove/install right cylinder head cover
ENGINES 272, 273 (except 272.983) in MODEL 212

112 589 00 25 00

Squeeze gun

Repair materials

Number

Designation

Order number

BR00.45-Z-1013-01A

Loctite sealant 5970

A 003 989 98 20

BR00.45-Z-1038-04A

Loctite 7200

Henkel Loctite Deutschland GmbH
Arabellastrasse 17
81925 Mьnchen
Germany
Tel. +49 899268-0
Fax + 49 899101978
www.Loctite.de

BR00.45-Z-1046-04A

Cleaning spray, Loctite 7063 (150ml)

A 001 986 71 71 10

Страница 3 из 3

© Daimler AG, 07.04.13, G/07/14, ar01.20-p-5012el, Remove/install right cylinder head cover
ENGINES 272, 273 (except 272.983) in MODEL 212

AR01.20-P-5013EL

Remove/install left cylinder head cover

2.3.10

ENGINE

272, 273 (except 272.983) in MODEL 212

P01.20-2126-09

1

Oil filter housing

6

Feed duct

10

Cylinder head cover

2

Power steering expansion reservoir

7

Fuel pipe

10a

Heat shield

3

Front cover

8

Fuel distributor

11

Engine lifting eye

4

Purge line

9

Ground cable

12

Rubber mount

5

Oil separator

Remove/install

Risk of death

Danger!

caused by vehicle slipping or Align vehicle between columns of vehicle lift

AS00.00-Z-0010-01A

toppling off the lifting platform.

and position four support plates at vehicle lift
support points specified by vehicle
manufacturer.

1

Turn key in ignition lock to position "0"

2

Remove bottom engine compartment

AR61.20-P-1105EW

paneling

3

Drain coolant at radiator

AR20.00-P-1142EWS

Notes on coolant

AH20.00-N-2080-01A

4

Remove air filter housing

AR09.10-P-1150EWS

5

Remove poly-V belt and poly-V belt

AR13.20-P-0001EWS

tensioning device

6

Remove coolant thermostat

AR20.10-P-2460EW

7

Remove oil filter housing (1)

AR18.20-P-3471EW

8

Remove expansion reservoir (2)

AR46.25-P-1000EWL

9

Remove front cover (3) at left cylinder head

AR01.30-P-5700EWL

10

Detach the purge line (4) at separation point
(arrow), unclip it from brackets on oil
separator (5) and feed line duct (6) and
place it to the side

11

Reduce fuel pressure at service valve

AR07.03-P-1460-01VA

*BA07.03-P-1004-01B

Engine 272

*119589046300

12

Detach fuel line (7) at fuel distributor (8)

Catch escaping fuel with an absorbent

rag!

Seal connections immediately with stop

plugs.

*BA07.03-P-1001-01B

*129589009100

13

Remove ignition coils on left cylinder head

AR15.12-P-2003EW

14

Remove oil separator (5)

AR01.20-P-9750EWS

15

Detach ground line (9) from cylinder head

*BA01.30-P-1001-01O

cover (10)

16

Remove left rear engine lifting eye (11)

*BA01.30-P-1005-01O

Страница 1 из 3

© Daimler AG, 07.04.13, G/07/14, ar01.20-p-5013el, Remove/install left cylinder head cover
ENGINE 272, 273 (except 272.983) in MODEL 212