Oil Pan - Upper Part, Remove and Install (C 22 SEL and X 20 XEV with Differential / Balancer Shaft Unit)
 Remove, Disconnect Unclip wiring harness plug of oxygen sensor from bracket and detach - expose cable. Remove oil drain bolt - collect escaping engine oil. In version with dynamic oil level control: Disconnect wiring harness plug from dynamic oil level control sensor. Remove lateral engine compartment cover. Disconnect engine damping block fastening nut (front right) (1) from front axle body. Disconnect coolant line fastening clamp (2) from front axle body. Remove front exhaust pipe. Remove air intake hose - see illustration "Air Filter Housing, Air Flow Guide". Disconnect torque support (3) from both torque support brackets and remove. | 
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Remove, Disconnect Attach engine to Engine Bridge MKM-883-1 and raise engine as far right as possible - ensure no components are damaged.
 Install, Connect Attach oil drain bolt to lower part of oil pan with new seal ring - tightening torque 10 Nm / 7.4 lbf. ft.
Remove, Disconnect Detach lower part of oil pan (1) from upper part of oil pan (3). Remove fastening bolts for upper part of oil pan (2) from transmission housing. Disconnect oil pan upper part (3) from cylinder block and oil pump - note different length of bolts.
 Clean Remove gasket remnants and clean sealing surfaces. | 
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Install, Connect Apply a bead of adhesive sealing compound (black) to joints (arrows) of oil pump and rear crankshaft bearing cap. Install upper part of oil pan (1) with new gasket to cylinder block, oil pump and transmission housing. Installation sequence:
1 Loosely tighten all fastening bolts
2 Tighten fastening bolts to cylinder block - tightening torque 20 Nm / 15 lbf. ft. 1)
3 Tighten fastening bolts on transmission housing - tightening torque (M8) 20 Nm / 15 lbf. ft. or (M10) 40 Nm / 30 lbf. ft.
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1) Re-cut thread before re-use and insert with screw locking compound (red). The installation time including torque check is max. 5 min.
Install, Connect Attach lower part of oil pan with new gasket and new fastening bolts to upper part of oil pan - tightening torque 8 Nm / 6 lbf. ft. + 30 ° . Lower engine via Engine Bridge MKM-883-1 and remove engine bridge. Connect torque support to both torque support brackets - tightening torque 60 Nm / 44.2 lbf. ft. Notice: Before assembling components of the intake system (hoses, connections, etc.), they must be cleaned of any possible contamination (grease, oil, etc.). When tightening the hose clamps, be sure to observe exactly the tightening torque of 3.5 Nm / 2.6 lbf. ft.
 Important! It is only ensured that the intake system is free of leaks, thus ensuring operational safety of the engine, if the hose clamps are tightened correctly to the prescribed tightening torque.
Install, Connect Install air intake hose - see illustration "Air Filter Housing, Air Flow Guide".
Install, Connect Attach front exhaust pipe with new gasket to exhaust manifold - tightening torque - 20 Nm / 15 lbf. ft. Connect fastening clamp-coolant line to front axle body. Connect engine damping block fastening nut (front right) to front axle body - tightening torque 45 Nm / 33.2 lbf. ft. Install side engine compartment cover. In version with dynamic oil level control: Connect wiring harness plug to dynamic oil level control sensor. Connect wiring harness plug for oxygen sensor and clip into bracket. Fill engine oil up to "MAX" on dipstick.
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