200D trunk not opening!

I have a 1966 200D. Can't open trunk. The key works to unlock, but when you push in button, it does not release the latch. My question is this: Can I get into trunk through back seat-and how do I remove that seat.

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Body and Interior Specific Aid

Chassis Model Number

W110 W111 W112 Sedan

No access through back seat

You have to get into the trunk to remove the nuts holding the seat back to a metal panel - so you can't go that way. First try this - Turn the key all the way one way as hard as you can and then push in on the button while holding the turn. Then turn key all the way the way way and hold the key hard over while while pushing in on the button. If that does not work check with locksmith. Final solution may require drilling.

Trunk locks on old Mercedes can be a pain.

For that old trunk lock, I recommend the following. First, I used a product called Tri-Flow. It is the only product I know of that professional locksmiths will spray into a lock mechanism. The only place I can find this stuff anymore is at locksmith shops.

I stick the little injector tube into the lock and give it a good spray. I then slide the key in and out of the lock 10 to 20 times to help spread the lubricant around. I then start gently turning the key back and forth in the lock. At the same time I wiggle the key back and forth and up and down GENTLY to loosen and get the pins in the lock to line up so that the lock will open.

If you are not successful, and you have more than one key for the car, try the others. Over time a key will wear down and sometimes a different key will work. If you have more than one key, compare all of them. If one of them is made of steel instead of brass, that is probably the original key. If it works, go to your locksmith and have him make a copy in brass. The steel keys are harder on the insides of the lock than brass.

Ultimately, with the older style lock that is in that car the locksmith can make you a key that will work if the lock is not broken inside. The newer style locks are very difficult for a locksmith to make new key keys for without a key to copy.

Getting new keys for newer Mercedes is a job. You have to go to dealer with the title to your car in order for them to replace your keys.

Good luck,
Michael

trunk latch problem solved

Thank you all for the input. I had to cut the latch out-I took a hack saw blade and slipped it between the rubber seal and the latch, and cut the blind bolt that secures the latch to the trunk lid. I discovered a worn push mechanism in the latch, and welded some additional metal to it, and voila' works like a charm.