Waytago! After the cylinter and key were out, did the cylinder turn
freely? (Indicating the problem was actually in the steering lock
itself) In 40+ years, I've never heard of a steering lock failure.
They are normally not lubricated. Tom can confirm(or refute) that.
David Bruckmann via Mercedes wrote on 7/16/19 3:09 PM:
Victory!
For reference, unlike later models, the W116 doesn't require the key to be in a
particular position to remove the electrical connector from the ignition lock.
By loosening the three flathead screws slightly, I was able to determine that
the electrical portion was NOT the problem.
By some MIRACLE, the key was turning JUST far enough to allow me to depress the
lock pin that prevents removal of the steering lock from the steering column.
If that hadn't been true, it would have been a bloodbath because there's really
no room to work in there. Anyway, I lucked out and then just had to unbolt the
steering column tube (two bolts) and basically reef down on the steering wheel
until the lock assembly is withdrawn from the column tube. The normal procedure
is to remove the protective cap before attempting to remove the column lock,
but since I couldn't turn the key...
Anyway, chuffed with victory having extricated the column lock, I set to work
on it in the kitchen! I needed to get that key to position 1 in order to remove
the hardened steel cover. I attacked the back of the steering lock assembly
where there's a cover plate pressed into the surface. It took about 15 minutes
with an oscillating Dremel tool until whatever was in it came free. Hallelujah,
I was able to turn the key, extract the lock cylinder, and do the happy dance.
I have ordered a new genuine MB column lock from FCP Euro and it will be here
tomorrow!
Incidentally, the column lock was completely dry, as was the tumbler. I'll
grease them up with hopefully-appropriate lube before reassembly. Have sent a
note to Tom Hanson at the Classic Center as well to see if there's really no
longer any ignition lock tumblers available for this car.
D.
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