I thought I would change the help change the plugs on a friend's '98 E320.
We managed to remove the plastic engine cover (Just pulls off)
There are two plugs per cylinder.
Plug wires seem to disappear into a clamp like fitting
Plugs are not visible but must be down inside there somewhere :)
What is involved,
(a) removing plug wires and
(b) removing plugs in tight space.
Any special tools required?
I think that MB introduced "phased twin-spark ignition" in '98 on the E320
which uses two per cylinder. As for special tools, I think that the answer
is "yes" as you'll need a special tool (spark plug connector pliers) to
remove the ignition wires from the spark plugs.
There are definitely 12 plugs on the V-6 - They are hard to get at, and may
need some type of angle wrench. Getting the wires off the plugs in the
cramped area will be quite a trick, unless they come off easily.
I don't think the dealer will charge that much in labour to do the job, but
then I have to pay their price for the plugs :(
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