How to replace the spark plugs on a 1994 Mercedes E320 (M104 engine, W124 chassis)
1994 Mercedes E320 Spark Plug Replacement (M104 engine, W124 chassis)
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if i want buy one , is there ? or no ? , i’m talkin about the E320
Thank you sir.Also i’m looking at a 1998 BMW 740IL with 144K miles on it.I prefer the BMW what do you think about the 740il?Thanks John
The 94 models have 2 known problem areas. The first being the main engine wiring harness being biodegradable, see my other video on how to replace it. The second issue is oil leaks around the front of the engine. Depending how bad it is, you may choose to do nothing about it. Otherwise the engines are pretty bulletproof and 155K is nothing on them.
I’m thinking about getting a 94 320 with 155k miles on it.Any advice on what I should look for? Thanks
Very well done!
have watched many of your videos, great job and thanks for all the videos.
I believe that MB recommends changing spark plugs every 30K miles. I am not sure that they have a recommendation for wires and coils. Clearly, ozone and the biodegradable harness exacerbates the issue, I would probably change them every 100K miles or if you don’t drive it much every 10 years.
shud u change the wires and coils at the same time ? or we can change just the spark plugs only? what is the general rule??? Thx…
You are using that torque wrench totally wrong. You should slowly tighten the plug, approaching the desired torque slowly, and smoothly. When the wrench clicks and lets go, STOP RIGHT THERE. You are tightening too fast, reaching the torque and tightening further then what is needed. Clickers are delicate, so always use smooth and steady torque application and always reset the wrench to zero after use or it’ll become out of calibration and inaccurate.
Very nice instruction video, thanks! I guess the job has to be done when the engine is cold?
Have not had the pleasure yet!!! There is a good writeup on Peachparts Mercedes Shopforum, just search for the user: 71Rcode
GOOD JOB !!!!
Do you have VIDEO on a air pump replacement ?.
Excellent. When removing the air mass sensor assembly clips (left hand side) hold onto the lower clip as it can drop away.
Nice video!
Ignition coils on M104 engines are held in place by the alen bolts which screwed through cover. So basically cover presses down the ignition coils. Just a minor correction. Thank you for the video though.
Really helpful, thank you very much.
Very helpful. It’s nice to see what parts have to be removed to get to the spark plugs. And remember to use anti seize compound on the plugs. Thanks again.
Thank you! Nice video. I am going to change my sparkle plugs next week. So this is very helpful and at time video instruction.