How difficult is it to change the spark plugs on a w124 from 1987? Can anyone give me a detailed way to go about doing this and tell me where the plugs are located? Thanks.

 

Just on top of the exhaust manifold. I'm not a W124 pro or anything but I did it myself as well. Take the cables off and use a tool to screw out the spark plugs, get some lubricant for the new ones and screw em back in and reverse procedure. Anybody more experienced feel free to add input on what I didn't know,

 

Thanks! Much appreciated.

 

The hardest part is getting the spark plug wire cover back on, if you remove it.
Plugs are very accessible, be careful in pulling the plug boot off if the plugs haven't been changed in a while.
Pull from the bottom of the boot not from the top or the wire.
You may have to "wiggle" the boot a bit to loosen it !!!