V12 gasoline engine Mercedes S-Class (W140)

Removal and installation the engine
Removal Removal and installation of engines M120.980 1. Raise the hood. 2. Disconnect the negative cable from the battery. 3. Remove the air filter together with the air...

Air purifier — installation details
Air Purifier Installation Details 4 - Air filter; 10 - Air intake; 53 - Air duct; 54 - Clamp

Cylinder Head Covers — Removal and Installation
Removal Cylinder Head Cover Installation Details 1. Remove the intake manifold. 2. Remove the fan clutch. 3. Remove covers (14), (15) and (16) from the distributor (6)....

Removal and installation the intake manifold
Intake manifold of engines M120.980 Removal Installation details of the intake manifold of engines M120.980 (the arrow shows the locking tab of the distributor cap) 6 -...

Removal and installation the exhaust manifold
Front left exhaust manifold Rear Right Exhaust Manifold Installation Details (the left front one is installed mirror-like) 12 - Self-locking nuts 156b - Front left...

Exhaust Gas Recirculation Valve — Installation Details
Exhaust Gas Recirculation Valve Installation Details 53 - Corrugated air intake pipe; 54 - Clamp; 89 - Exhaust Gas Recirculation (EGR) Valve; 89/1, 89/2 - Nuts; 89/3 -...

Air supply pump — removal and installation
Removal Air supply pump installation details 1, 2 — Bolts 3, 4 - Tubes 125 — Air supply pump 1. Remove the air filter. 2. Remove the generator drive belt. 3. Disconnect...

Removal and installation the upper front covers
Removal Upper Front Cover Installation Details 1a - Retainer; 3 - Distributor rotor (engines 120.980); 4 - Runner (engine 120.980); 5 - Protective cover (engines...

Cylinder heads — removal and installation
Removal Left cylinder head installation details 11 - Bolt; 12 - Bracket; 13 - Camshaft bearing cap; 16 - Cylinder head; 18 - Gasket; 19 - Ventilation tube; 22 - Exhaust...

Removal and installation the timing chain cover
Removal Timing Chain Cover Installation Details 1. Remove the front covers. 2. Remove the cooling system pump (2). 3. Remove the air filter with air flow meter. 4....

Timing chain replacement
Note: See also Section Timing Drive - General Information, Component Maintenance Timing chain replacement A - Timing chain disconnection; B - Riveting the timing chain...

Timing Drive — General Information, Component Maintenance
Note: The camshafts can be turned without the risk of valve-piston collision when the crankshaft is set to a position 30° before TDC of the piston of the first cylinder....

Timing chain tensioner — removal and installation
Note: See also Section Timing Drive - General Information, Component Maintenance Timing Chain Tensioner Installation Details 1 - Cork; 5, 15 - Sealing rings; 7 - Finger;...

Camshaft adjuster — removal and installation
Removal Camshaft adjuster installation details 1 - Guide lever of the right cylinder head; 2 - Left cylinder head guide lever; 3, 15 - Bolts; 4 - Reinforcement; 5 -...

Removal and installation camshafts
Removal Camshaft Installation Details 1. Remove the front top covers (30) and (30a). 2. Remove the cylinder head guide levers (40). 3. Unscrew the sprocket (3) of the...

Checking the valve timing
Valve timing of the M120.980 series engine Check the digital designation of the camshafts. The codes are stamped on the journal of the 3rd bearing or on the flange....

Checking and adjusting the position of the camshafts
Checking the position of the camshafts 1. Install the piston of the first cylinder. 2. The piston of the first cylinder is in the TDC position when the cams of the...

Replacing valve guide bushings
The dimensional characteristics and installation details of the valve guide bushings are given in Specifications . Valve guide bushing installation details

Removal and installation pistons
Removal 1. Unscrew the connecting rod caps and remove the connecting rods together with the pistons. Note that the connecting rods and connecting rod caps of one...

Removal and installation the crankshaft
Removal 1. Remove the timing chain from the camshaft sprockets and the crankshaft sprocket. 2. Remove the oil pump drive chain together with the tension lever, tension...

Removal and installation the engine oil pan
Engine Oil Pan Installation Details Removal 1. Remove the alternator drive belt. 2. Remove the air filter with air flow meter 3. Disconnect the negative cable from the...

Oil Level Switch Sensor — Installation Details
Oil pump installation details 1, 2, 3 - Bolts; 4 - Bushings; 6 - Oil pump; 7 - Oil pump sprocket Oil level sensor installation details 1 - Cork; 2 - Finger; 3 -...

Oil pump — design and installation details
Oil pump installation details 1 - Oil pump; 6 - Bolt; 7 - Oil pump sprocket 8, 9 Bolt with gasket; 10 - Compensator; S43 - Oil level sensor Pump and filter diagram 1 -...

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W140 (1991-1998)