Two cars, one key?
Thread Starter
MBWorld Fanatic!
Joined: Jun 2021
Posts: 1,919
Likes: 522
From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
Two cars, one key?
Any idea if I can program the GLK to accept the key from the GLS? The GLS has power tailgate and Keyless Go; the GLK does not. Sure would be nice if I could drive either one with one key in my pocket.
(I know the emergency key would not work...)
TIA
(I know the emergency key would not work...)
TIA
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,562
Likes: 197
From: Austin, TX
2006 E55, 2012 GLK350 & 1992 190e sportline
Nope not a chance. they are vin coded.
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,369
Likes: 319
From: WI
GLK 250
New key fobs have to be coded to the car, based on the VIN. I was just perusing the FCPEuro site and saw the tool used for that purpose is $1400.
Specifically to answer your question, one key fob can ONLY be coded to ONE vehicle at a time. You can code as many key fobs as you want for that car, but ONLY that car.
Specifically to answer your question, one key fob can ONLY be coded to ONE vehicle at a time. You can code as many key fobs as you want for that car, but ONLY that car.
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,562
Likes: 197
From: Austin, TX
2006 E55, 2012 GLK350 & 1992 190e sportline
New key fobs have to be coded to the car, based on the VIN. I was just perusing the FCPEuro site and saw the tool used for that purpose is $1400.
Specifically to answer your question, one key fob can ONLY be coded to ONE vehicle at a time. You can code as many key fobs as you want for that car, but ONLY that car.
Specifically to answer your question, one key fob can ONLY be coded to ONE vehicle at a time. You can code as many key fobs as you want for that car, but ONLY that car.
Thread Starter
MBWorld Fanatic!
Joined: Jun 2021
Posts: 1,919
Likes: 522
From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
But how would the key know it was coded to more than one car, and how would the car know the key was also coded to the other car?
Unless they talk to each other in the driveway.
I'm assuming there is something like an RFID chip in the key that in the GLK allows the key to turn the switch and in the GLS allows the push button to work. If you have Keyless Go you probably know that you can remove the button and use the key exactly as you can in the GLK. Seems to me (If they're compatible) you (or the dealer) could program the GLK to accept the GLS key and the key and GLS would be none the wiser. Bonus points if the lock and unlock buttons also work.
Sure would be convenient...
Unless they talk to each other in the driveway.
I'm assuming there is something like an RFID chip in the key that in the GLK allows the key to turn the switch and in the GLS allows the push button to work. If you have Keyless Go you probably know that you can remove the button and use the key exactly as you can in the GLK. Seems to me (If they're compatible) you (or the dealer) could program the GLK to accept the GLS key and the key and GLS would be none the wiser. Bonus points if the lock and unlock buttons also work.
Sure would be convenient...
Last edited by John CC; Aug 4, 2021 at 10:46 PM.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
MBWorld Fanatic!
Joined: Jun 2021
Posts: 1,919
Likes: 522
From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
So, if I loose the key, and get a new one, what gets programmed, the key to match the car, or the car to accept the new key? If it's the latter, how does anyone know the key doesn't already work in another car?
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,369
Likes: 319
From: WI
GLK 250
And yes, the key fob and car “talk” to each other if in range, if the car is not locked.
Super Member
Joined: Feb 2007
Posts: 601
Likes: 285
From: Republic of Texas
W203 W212 W211 R53MCS
You can actually have one key start both cars......... but central locking will not work for both at the same time. For example, my wife has a W212 and I have a W203. I programmed both EIS's with the data from the W212. Now, if both cars are unlocked, I can insert the key and start both cars with no problem. But central locking (lock/unlock/panic) will only work on the last car the key was used on. One last thing, to clarify...... both vehicles have to be FBS3 systems.
