mercedesbenz Workshop Repair Guides

Mercedes Benz Workshop Service and Repair Manuals

Diagram Information and Instructions|Page 4871 > < Diagram Information and Instructions|Page 4869
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Ignition Coil, Circuit Diagram

Since the secondary winding is switched in series with both spark plugs, it has the effect of an open circuit (e.g.: on the spark plug connector) on
both ignition sparks.

The resistance of the secondary winding must be checked between both high-voltage connections:
Nominal value: 5.2 - 8.5 kohms

Resistance of primary winding between connection 1 and 15:
Nominal value: 0.3 - 0.4 Ohms

Advantages of static high-voltage distribution:
-

Reduced electromagnetic noise level (no open sparks),

-

No rotating parts,

-

Noise reduction,

-

Fewer high-voltage connections.

Location of Ignition Coils and Distribution of High-voltage

Ignition Coils (T1/1, T1/2, T1/3)

The ignition coils are located on the valve cover. Each ignition coil provides high-voltage simultaneously to two spark plugs.

Ignition coil 

Cylinders

T1/1 

2 and 5

T1/2 

3 and 4

T1/3 

1 and 6

Diagram Information and Instructions|Page 4871 > < Diagram Information and Instructions|Page 4869