Replacing Spark Plugs for Mercedes W212 (M276) 更换奔驰E350火花塞

Every 6 years or 60,000 miles we have to replace the spark plugs of our Mercedes, that&requiring of Mercedes maintenance booklet. So let&replace the spark plugs for my six years E350 (M276). In the MB repair booklet, there is a step to remove the intake manifold, in order to remove the ignition coil easily. But that must replace the intake plenum gasket, that&spend another a hundred bucks and more time. So follow this video, you might save that bucks and time to replace all of six spark plugs. 奔驰的保养手册要求每六年或六万英里更换火花塞，我的E350（M276）已经六年了，换吧。注意，奔驰的维修手册要求拆掉进气总管，以方便拆掉点火模块，但那必须更换进气总管与进气歧管间的密封圈，费钱、费事又费力。按照我的方法可以省掉那些步骤和钱。