Removal and Replacement

11 00 050 - Removing and installing engine (M54)





Special tools required:
- 11 0 020 11 0 020 Engine Hoist for Removing and Installing Engines
- 11 0 250 11 0 250 Engine Support
- 13 5 280 13 5 280 Plugs for Fuel Lines





Necessary preliminary tasks:
- Disconnect battery negative lead. (Follow instructions for disconnecting and connecting battery) Instructions for Disconnecting and Connecting Battery.
- Lift engine hood Procedures into assembly position.
- Remove design cover.
- Remove air cleaner housing Service and Repair.
- Remove clean air duct.
- Remove heater bulkhead 51 71 080 Removing and Installing/Replacing Heater Bulkhead.
- Remove left assembly partition wall.
- Release engine wiring harness from electronics box.
- Drain coolant Service and Repair.
- Remove radiator Service and Repair.
- Remove A/C compressor drive belt Replacing A/C Compressor Drive Belt (M52/S52/M52TU/M54/M56).
- Remove alternator drive belt Replacing Alternator Drive Belt (M52/S52/M52TU/M54/M56).
- Disconnect fuel line (feed).
- Remove front/middle underbody protection.
- Remove reinforcement plate Service and Repair.
- Remove exhaust system Service and Repair.
- Remove transmission.
- Remove oxygen sensors (monitor).





Detach vacuum line (1) from vacuum accumulator.





Note:
Automatic transmission only:
Release transmission fluid line screw (1) on engine oil sump.





Release fuel line (1).
Seal off fuel line with special tool 13 5 280 13 5 280 Plugs for Fuel Lines.





Recycling:
Catch and dispose of escaping fuel in a suitable container.
Observe country-specific waste-disposal regulations.





Disconnect all plug connections on windscreen washer fluid reservoir (1).
Press windscreen washer fluid reservoir (1) in direction of arrow upwards.
Secure windscreen washer fluid reservoir (1) with a cable tie (2).





Remove special tool 11 0 250 11 0 250 Engine Support.

Important!
Engine tips forward - risk of damage.

Remove tension strut (1).





Secure engine wiring harness (2) on engine against falling out.
Mount special tool 11 0 020 11 0 020 Engine Hoist for Removing and Installing Engines on engine.

Important!
Pay attention to chain of special tool 11 0 020 11 0 020 Engine Hoist for Removing and Installing Engines. Risk of damage to manifold.
Only raise engine at the suspension lugs (1) provided for this purpose.





Release grounding strap (1) on right engine support arm.
Unscrew nut (3).





Release nut (1) on left engine support arm.





Note:
Automatic only:

Raise engine approx. 10 cm.

Release screws (1).
Remove transmission fluid lines (2).

Installation:
Reinstall the transmission fluid lines in reverse sequence to prevent damaging them during installation.





Important! Narrow points:
- Steering gear.
- Condenser.
- Bulkhead.

Remove engine carefully.





Assemble engine.
Fill Service and Repair cooling system and check for leaks.
Check engine oil level.