Smart fortwo Ignition Knob
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Recommended filament for this print
Product references matched to the published material guidance. Confirm diameter, heat resistance, colour, and printer compatibility.
| Referenced item | What to verify | Price & availability |
|---|---|---|
| PETG filamentAmazon · Affiliate link | Amazon product page for 1.75 mm PETG; confirm colour, spool size, print temperature, seller, and delivery region. | Check price at Amazon |
| ASA filamentAmazon · Affiliate link | Amazon product page for 1.75 mm ASA; use an enclosure and suitable ventilation, and confirm seller and regional availability. | Check price at Amazon |
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License & use
The file license permits commercial reuse, subject to any applicable attribution or share-alike terms. License status does not verify vehicle fitment, OEM rights, design patents, or safety.
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Ryan Riopel (Rioryan)Designers selling from the US, Canada, the UK, the EU/EEA (except Iceland), Switzerland and Gibraltar can also list separate original designs for sale and receive 80% of the listing price, paid out by Stripe in your local currency (conversion fees may apply). Claiming credits you here; it doesn't put this imported part up for sale.
Description
I got this idea from an aluminum product sold in the UK. Yank your ignition key out of the key fob and stick it in this knob. It can now stay in the car, and most folks won't even realize the key is in the ignition. Most importantly, as Smart owners know, the remote is the immobilizer. Even if somebody were to try to start the car when you aren't around, it won't run. You can still lock the car, and basically forget the key even exists. Just unlock it, get in, and turn the knob. I set the tolerance based on my printer to be a semi-interference fit. No adhesive is required, there is enough friction to keep the key firmly in place. It's still removable with similar effort to removal from the factory key fob remote. If you want it made out of aluminum, here's a link to the UK product
Compatible Vehicles
Originally published on thingiverse.com by Ryan Riopel (Rioryan) · License: CC BY
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