13 62 531 Replacing Coolant Temperature Sensor (N54)

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WARNING:

Danger of scalding!

Only perform these tasks on an engine that has cooled down.

Recycling

Catch and dispose of escaping oil and coolant.

Observe country-specific waste-disposal regulations.

Necessary preliminary tasks:

Read out fault memory of DME control unit
Switch off ignition
Remove acoustic cover
Remove fan cowl

NOTE: Coolant temperature sensor is mounted on cylinder head at front.

Release screw.

Tightening torque 17 21 1AZ. See COOLING SYSTEM - TIGHTENING TORQUES - SEDAN .

Disconnect oil line (1).

Catch and dispose of emerging fluid.

Fig 1: Locating Oil Line

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Installation:

Replace sealing rings.

Fig 2: Locating Sealing Rings

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Unlock plug (1) and remove.

Release temperature sensor (2).

Installation:

Tightening torque 13 62 1AZ. See 13 62 SENDERS FOR CONTROL UNIT

If necessary, top up coolant.

Check cooling system for leaks.

Fig 3: Identifying Temperature Sensor & Plug

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NOTE:

After completion of work, check engine oil level.

Check stored fault messages.

Now clear the fault memory.