Options to Add a Spare Key for Mercedes-Benz: Why the Bodyguard No.1 No-Damage Adapter Box is the Best Choice

Sep 18, 2026

Option 1: auto dealership OEM Key

✅ Advantages: OEM solution, highest security

❌ Shortcomings: High cost, cumbersome documentation, ordering cycle as long as 15 days, long wait for the vehicle owner

👉 Suitable for: Customers who do not mind the budget, pursue a pure OEM solution, and are not in a hurry to use the vehicle

Option 2: Old-style Soldered Adapter Box (low-priced model on the market)

✅ Advantages: Low quote

❌ Shortcomings: Must disassemble the original vehicle key shell + solder the mainboard

Two major core risks:

Soldering the original vehicle key mainboard can easily cause cold solder joints, short circuits, and signal loss, resulting in the vehicle being unable to start;
Once the mainboard has been modified, if there is an anti-theft problem, there is no guarantee, leading to many after-sales disputes, and the locksmith takes the blame.

👉 Reminder: Not recommended as a main offering, high after-sales risk

Option 3: No. 1 Bodyguard Non-destructive Adapter Box (main recommended option)

✅ Advantages

Zero damage to the original vehicle key: no need to remove the shell, no need to solder; the original vehicle key is placed completely inside the box without modifying the circuit board;
Non-destructive installation: dedicated vehicle-specific plug-and-play wiring harness, no wire cutting or routing on the vehicle, completed in 10 minutes;
Full function coverage: keyless entry, touch door handles, remote control, trunk, and one-touch window up/down are all retained;
Can add 2-3 brand-new smart keys;
Simple operation, stable after-sales, greatly reducing after-sales trouble for locksmiths;
The original vehicle key itself remains intact, with no risk of damage from soldering, making it easier for customers to accept.
🛒Buy link: https://www.wayrays.com/Search-zjz-/list-r1.html