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Replacing Spark Plug
Engine: M276 DE35
Labor: 2 hours
Replacing spark plus is regular maintenance. There is a requirement every 60k miles or 6 years to replace the spark plugs in the MB maintenance booklet. To naturally aspirated engine of M276 DE35, there is a step to remove the resonance intake manifold to reach the ignition coil in the WIS. But that must replace a set of expensive intake plenum gaskets with more labor. Removing the ECU may make more room to reach the concealed ignition coil and spark plugs. More detail below.
Parts & Accessories
Replace Spark Plugs of 4th, 5th & 6th Cylinder
Step 1 Open The Engine Hood
1.1 Pull lever on left side of the footwell to unlock the engine hood. The engine hood jumps open; lift engine hood slightly if necessary;
1.2 Pull out handle and lift to open engine hood. (Windshield wiper arms must not be folded forward).