Replacement of the spark plugs Gasoline engines - wh1580pkw0000x(1580)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Models 107 from 8/85, 123, 124, 126 from 9/85, 129, 140 to 6/93, 201 from 1/85)

Revision: Engine 104 HFM, 111 added

Fig 1: Loosening Straight Spark Plug Connectors With Pliers

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Removing Spark Plug

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Spark plug cover	remove, install. Engine 104 HFM (see item 1).
Spark plug connectors	loosen by turning slightly and pull off, reinstall
NOTE: Loosen straight spark plug connectors with pliers (090) 103 589 00 37 00 and pull off.
Spark plug wells or recesses Spark plugs	blow out with compressed air. remove, install. See table for tightening torques and type of spark plug wrench required.
NOTE: Install only approved spark plugs (see Diagnosis Manual, Engine, Volume 1 or parts microfiches).	Engine 104 HFM (see item 2). Engine 120 (see item 3).

TIGHTENING TORQUES IN NM

Spark plugs with conical seat	10-20
park plugs with flat seat	25-30

Match-up engine/spark plug seal/spark plug wrench

Fig 3: Locating Spark Plug Seal

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CIS/CIS-E INJECTION SYSTEM AND CARBURETOR SYSTEM

Engine

Spark plug seal

Spark plug wrench

102, 103

Conical seat (B)

102 589 01 09 00

104, 119

Flat seat (C)

120 589 02 09 00 ⁽¹⁾)

116, 117

Flat seat (A)

117 589 00 09 00

⁽¹⁾	Use with standard torque wrench.

LH/HFM/PMS INJECTION SYSTEM

Engine

Spark plug seal

Cylinder

Spark plug wrench

104, 111

Flat seat (C)

all

119 589 01 09 00

119

Flat seat (C)

1-3 and 5-7

120 589 02 09 00 ⁽¹⁾

4 and 8

119 589 01 09 00

120

Flat seat (C)

1-5 and 7-12

120 589 02 09 00 ⁽¹⁾

119 589 01 09 00

⁽¹⁾	Use with standard torque wrench.

Special tools

Fig 4: Identifying Special Tool 15 (120 589 02 09 00)

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Fig 5: Identifying Special Tool (102 589 01 09 00)

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Fig 6: Identifying Special Tool 15 (103 589 00 37 00)

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Fig 7: Identifying Special Tool (117 589 00 09 00)

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Fig 8: Identifying Special Tool 15 (119 589 01 09 00)

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Remove, install spark plug covers
Engine 104 HFM

Remove air cleaner cross-tube, cable duct (12), ignition cable duct (5/1) and guide rail (5/2), install.

Fig 9: Identifying Air Cleaner Cross-Tube, Cable Duct, Ignition Cable Duct And Guide Rail - Install Engine 104 HFM
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Remove, install ignition coils
Engine 104 HFM

Remove ignition coils (T1/1, T1/2, T1/3) with ignition coil control leads and ignition cables connected, install.

Fig 10: Identifying Ignition Coils (T1/1, T1/2, T1/3) - Engine 104 HFM
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Partially loosen cable duct
Engine 120

Partially pull off rubber seal, remove cover for EZL control unit (A) and wiring harness (B), re-install.

Screw out mounting screws (arrows) for wiring duct, screw in.

Unhook wiring duct and push toward front.

Fig 11: Identifying EZL Control Unit Cover And Wiring Harness With Screws
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.