Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
11 0 091 Installing Replacement Engine (S85)
Necessary preliminary tasks:
- Remove and install engine .
Running-in engine oil must be changed at 2000 km for a 10W-60 engine oil incl. engine oil filter.
Installation:
Modifying check valves, refer to memory entries in DME.
In engines where it is not possible to connect check valves, replace the vacuum-controlled check valves with self-opening check valves.
Vacuum lines will then no longer be required.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.