My ignition suddenly got difficult to turn...so, I quickly called up a local dealer and ordered a new lock cylinder. Better to catch it before it turns into a major problem! Since I didn't see anything for the W124 chassis, I thought it would be appropriate to write up something quick for it

If you have the service manual cd, the literature is under the Chassis and Body section, under steering (Removing and installing lock cylinder 46-8110)

• Tools / parts needed

1. New lock cylinder (as of 9/11/09 - $91.50 from dealer)
2. Screwdriver (for removing trim)
3. Hanger or wire (roughly 2 mm diameter wire)
4. Diagonal cutters
5. Ruler / tape measure

• Test hanger thickness (or welding wire, etc).
• Construct tool: Unbent length = 32cm. Two 90 degree bends with two outside 15 cm lengths leaving 2 cm in center. Use diagonal cutters to cut 45 degree portions off the tips (on the interior side - see picture). I also used a little bit of sandpaper to clean up the cuts.
• Remove trim.
• Insert wire tool with key in number 1 position (mine was a bit of a pain to get it to release the lock cylinder).
• Pull old cylinder right out.
• Remove key from old cylinder and swap cylinders in cap (black with small detents).

Attached Thumbnails

         

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1982 240D, sold 9/17/2008
1987 300D TurboW124.133 - 603.960, 722.317 - Smoke Silver Metallic / Medium Red (702/177), acquired 8/15/2009
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