380SE -85 has a worn out ignition tumbler. Purchased new tumbler with new key from dealer (vin matched). I decided to pay now and purchased also new steering lock, new lock cover, and ignition switch. Made a massive search and found that tumbler replacement is not a problem.

My question would be: is the W126 steering lock+switch replacement DIY?? I think I should remove instrument cluster, and the lock+switch can then be replaced through the cluster hole. Am I correct with this? Thanks for your help.

I've replaced a steering lock mechanism when the key would NOT turn in under 3 hrs DIY (had to grind out retaining button on column lock), so I think you'll do much better than I did, since your key will release all components. Access thru the IP opening just as you planned and remove the knee panel as well. Loosen the steering column bolts (two) at the IP opening to drop the column a couple of inches to make it easier. Be very firm with the retaining "button" on the steering lock where it enters the column collar. It's a lot of push and twist work, but fairly intuitive.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

Thank you jbaj007. IŽll drop the knee panel first, then push the IP out from behind and follow your advice. Seems like a rewarding task for a DIYer.

I did it. It was necessary to replace the tumbler and the cover only, because I found fresh switch+lock there, thanks to PO. I took the whole assembly out but didnŽt have to replace them, the time was not wasted because I know now how I can replace e.g. the switch only . IŽve never pulled the IP out before, it took two hours with all hesitating and thinking and test driving, replacing the switch or the whole assembly is definitely DIY.

All the info to do the replacement can be found in this great forum. Very rewarding experience, and now instead of two worn out keys IŽve one new MB key that fits to all locks!