Date registered: Dec 2004
Vehicle: 300TE 4-Matic 300GD
Location: Oslo Norway
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
RE: Just picked up a 70 280 S help with ignition lock
Congratulations! I hope you take good care of the old woman, and I also hope it wasn't the Benz that caught fire.
There is nothing special to be pressed or done. Just put in the key, and turn. There are several reasons why a lock is stuck. If it was OK when parked, and now jammed after a period of time, I think the lock-pin may be stuck. Especially if the temperature was very constant.
I gather you have tried most of the normal steering wheel nugging and key turning. Remember, easy does it, never brute force.
Get two guys to try to turn each front wheel left and right in synchronicity, while you carefully prise with your key and steering wheel. This will often release the pin.
Still stuck? If you have a lady friend who owns a vibrator, try to apply it on the lock. She might refuse to lend you hers. I have a special vibrating tool, but those cost. A small careful tap with a pen hammer might also help.
If nothing of that helps, and you still belive it may be seized, you can do a No-no. Spray in some CRC, or WD40, and follow up with a slight air pressure dose. It's not wise to add lubrication to an ignition lock, but it's better than swapping.
A shot in the dark may be to have the key copied and try the new one. If it is the original lock, the key may be ordered from Germany, but that's complicated and expensive. It may sound weird, but I have seen it work.
You can also check that the upper and lower taps (Not sure of english name) are free to move. The best thing here, is a blank key. Instead, close out noise, stick in a long needle like instrument not thicker than your key. Try to press the needle parallel to the upper egde in the keyhole. Try to pull it out slow and evenly. listen for clicks. There should be 5 or 7. Other members may know exactly how many, or a locksmith or dealer. I would have to check my book, but it's not here for the moment.
If nothing of the above helps, I think you have a serious case, and hammer and chisel comes to mind.