1) Remove cooling fans for access. Remove accessory belts. Release PS hose clamp which is also in the way.
2) Break crankshaft pulley/harmonic balancer bolt and remove pulley (inspect closely for any defects or loosness between outer pulley and inner section). This can be difficult. I use a Honda restraint tool and 1/2" breaker bar jammed against drivers side frame to hold the engine, and 19-mm deep impact socket, 1/2"-breaker bar, and 3-ft cheater pipe over breaker bar to gain leverage. This works good. Air impact is an option only if you remove the radiator for horizontal access room. Not worth all the trouble.
3) Remove upper and lower TB covers
4) Replace TB, water pump, and idlers.
5) Reverse to close. Torque crankshaft pulley bolt to spec.
Mercedes Wheels
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