Guide · Mercedes

Mercedes W211 S-Series Key Replacement Guide

Last updated: September 2026 · Verified against OEM part numbers

Quick answer — Mercedes W211 S-Series

The Mercedes W211 S-Series (various model years) uses the smart key — verified against the original OEM part number. See every compatible option in the table below.

Key type: Smart Key
Wholesale: MOQ 5 units per SKU, models mixable in one order

Which Mercedes W211 S-Series key fits your vehicle?

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Compatible keys for Mercedes W211 S-Series

Years	Photo	Key
—	—	CGDI Changeable Frequency 3+Panic Button Smart Key for Mercedes FBS3
—	—	CGDI Changeable Frequency 3 Button Smart Key for Mercedes FBS3

Before you order

Match the year range — Mercedes changed key systems across model years. Check your registration year.
Check your current key — the OEM number printed on your key matches the table above.
Programming — smart keys need a compatible programmer (Xhorse, VVDI, Autel). We can advise which one works for each key.

Frequently asked questions

Which key fits my Mercedes W211 S-Series?

The Mercedes W211 S-Series (various model years) uses the CGDI Changeable Frequency 3+Panic Button Smart Key for Mercedes FBS3. Check the table above for all compatible options, verified against OEM part numbers.

Do you supply Mercedes W211 S-Series keys wholesale?

Yes. We supply locksmiths and key distributors at wholesale prices with MOQ from 5 units. Message us on WhatsApp for today's price list.

Can a Mercedes W211 S-Series key be programmed without the dealer?

In most cases yes, using tools like Xhorse, VVDI or Autel. We can advise the right programmer for each key SKU.

Ready to order a Mercedes W211 S-Series key?