I successfully r&r'd the ignition switch assembly today. All in all it took about 3 hrs from start dissassembly until wrapped up. Not difficult but if anyone else is attempting this procedure on the W140, a thought a couple of procedure changes to what is said in WIS would be helpful.

1) On reassembly, trying to connect the parking selector cable with the switch in place was a pain. Couldn't get it to mesh due to the confining space. I found you can connect the parking cable assembly to the ignition switch module below the dash area and then insert the ignition assembly onto the steering wheel lock after.

2) Really double check that the key is in the #1 postion before seperating anything. G*d help you if it isn't.

3) I found I didn't have to disconnect/remove the original steering lock assemble. All I had to replace was the ignition switch, tumbler and locking steel cap (over the tumbler). You don't need to replace the steel cap, just break up the original switch assembly and reuse.

Total cost was about $400 CAD.

Tower

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1995 E320 -171k-km
1995 S420 -333k-km