Replace this part now in your early 123 while the upgrade is still readily available! You may be surprised to discover we have this part at a very reasonable price. FREE digital installation manual included (PDF download). The original OE assemblies for the early 123 chassis are very hard to find and very expensive, even used. We have come up with a pre-assembled upgrade that will only require the addition of the multi-pin electrical switch on the back, as well as the small side buzzer switch (shown below in black) before it's ready to install (if you need a new electrical switch, these can be ordered separately. (See link below).
Product Details
The advantage of this upgrade is that you will now have the newer style ignition tumbler that you can easily replace in the future if it wears out (meaning you will save a lot of money). This unit is fully compatible with your existing steering column assembly, but it will require you to install the electrical switch from your existing unit or purchase a new one.
Here is a close-up look at the original style tumbler assembly that you currently have. Note the smaller diameter of the key tumbler housing.
When you install the new, larger-diameter upgrade in your dash, you will have to remove the chrome trim ring to get it to fit in the hole. Unfortunately, the new style (thinner) chrome trim ring is no longer available. You may be able to find a used one from a 1981 to 1985 123 chassis in a wrecking yard. If you can't find one, you'll see a gap in the dashboard. Refer to the picture below.
The picture below shows the old-style electrical switch that is mounted into the steering lock housing with three machine screws. This is an easy install. If you are not sure your existing switch is in great shape. Look below to add a new one to your order.
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Early 123 Early 107 Late 116 Genuine OEM Ignition Switch
Get a spare. These will soon be NLA. NEW OLD STOCK Genuine Mercedes Ignition Switch. Fits early 123 chassis up through 1979, early 107 450SL from 1973-1980 and 1977-1980 116 300SD, 280SE, 450SE, and 450SEL.
How to Replace a Mercedes Ignition Key Lock Buzzer Switch - On Demand Video
When replacing the steering lock assembly in your Benz you will need to remove that little black plastic switch on the side of the lock from the old one and put it on the new part. You can not pry it off, squeeze it off or pull it off by hand.