Replaced batteries in key and now no remote control locking ?

Programming
When
Remote control added or replaced. System malfunction.
How
Obtain all remote controls. A maximum of 3 remote controls can be programmed. Switch ignition ON. Repeat procedure below 3 times: Within 4 seconds: Press lock or unlock button. Within 4 seconds: Switch ignition OFF. Within 4 seconds: Switch ignition ON. Within 4 seconds: Press lock or unlock button. System should now lock or unlock vehicle. Within 4 seconds: Press lock or unlock button. Within 10 seconds: Press lock or unlock button of first remote control. System should now lock or unlock vehicle. Press lock or unlock button of second remote control. System should now lock or unlock vehicle. Press lock or unlock button of third remote control. System should now lock or unlock vehicle. Switch ignition OFF. Remove key. Check operation of all programmed remote controls.
IMMOBILIZER CAN ONLY BE SET BY DIAGNOSTIC EQUIPMENT

1
Programming
When
Key batteries completely discharged. Key batteries not replaced within 60 seconds. Key added or replaced. DO NOT press remote control buttons during battery replacement.
How
Unlock vehicle. Enter vehicle. Close driver's door. Switch ignition ON and OFF. Remove ignition key. Press and hold unlock button Fig. 1 [1]. Press lock button Fig. 1 [2] briefly 3 times within 10 seconds keeping unlock button [1] depressed. Release unlock button Fig. 1 [1]. Some models: LED Fig. 1 [3] flashes slowly for 10 seconds. Some models: Central locking system locks and unlocks rapidly to indicate correct programming. Some models: Repeat above procedure if central locking system does not work and LED does not flash or LED flashes continuously
Later keys with bmw badge on key. Battery can not be replaced
Battery in key charges while driving

Programming
When
Key batteries completely discharged. Key batteries not replaced within 60 seconds. Key added or replaced. DO NOT press remote control buttons during battery replacement.
How
Unlock vehicle. Enter vehicle. Close driver's door. Switch ignition ON and OFF. Remove ignition key. Press and hold unlock button Fig. 1 [1]. Press lock button Fig. 1 [2] briefly 3 times within 10 seconds keeping unlock button [1] depressed. Release unlock button Fig. 1 [1]. Some models: LED Fig. 1 [3] flashes slowly for 10 seconds. Some models: Central locking system locks and unlocks rapidly to indicate correct programming. Some models: Repeat above procedure if central locking system does not work and LED does not flash or LED flashes continuously

To change batteries remove panel back of key then screws on plastic bar
Batteries are available from your local motor factor shop
You might not need new batteries try re programing as described above

Synchronization
Turn ignition switch to position II. Turn ignition switch to position 0 and remove key. Within 1 minute: Press and hold key lock button. Press unlock button 5 times. Remote control should now operate system. If not: Repeat procedure.
Programming
When
Key remote control added or replaced. System malfunction.
How
Keys can only be programmed using diagnostic equipment.
NOTE this only works on ml up to 05

this usually happens when the battery has been disconnected from the vehicle, what happens is when the battery is disconnected the locking system fitted to the car has a pass-code that only the key-fob can access, as a result of the battery being removed the pass-code for the locking system on the car resets and does not recognise the fob being used. Your best chance to get this sorted is to take it into your local garage/dealer and get the fob linked back up to the cars locking system.

Synchronization
Turn ignition switch to position II. Turn ignition switch to position 0 and remove key. Within 1 minute: Press and hold key lock button. Press unlock button 5 times. Remote control should now operate system. If not: Repeat procedure.
Programming
When
Key remote control added or replaced. System malfunction.
How
Keys can only be programmed using diagnostic equipment

cbridges2232,

Any luck with your keyless remote issue? I'm having the exact same problem with my Ford F150 CrewCab after car battery replacement.

SOME OF THE REMOTES REQUIRE THAT THE KEY BE IN THE IGNITION, IN THE ON POSITION. TAKE THE BATTERY OUT AND WAIT 10 MINUTES. THEN PUT THE KEY IN THE IGNITION AND INSTALL THE BATTERY WHILE THE KEY IS TURNED TO THE ON POSITION. HOPE THIS HELPS YOU. PLEASE KEEP ME POSTED. THANKS FOR AN HONEST RATING AND FOR USING FIX-YA. GOOD LUCK

try this:

1. Start with key out of ignition, drivers door is open all others closed and
drivers door is unlocked.
2. Insert key into the ignition (DO NOT Turn) and Pull key out.
3. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Close, then open drivers door.
4. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Insert the key in the ignition cylinder.
C. Turn the ignition to ON (Do NOT Start) then back to OFF.
D. Remove the key from the ignition.
5. Press any button on remote for a minimum of 1 second.
System should now lock and unlock doors once.

6. Close and open drivers door.
7. Press any button on remote for a minimum of 1 second. System should now lock and
unlock doors. Once to confirm programming, twice to indicate programming failed.
8. Repeat steps 5, 6 and 7 for additional remotes.

VW/AUDI/SEAT/SKODA



Remote Control Programming (1997 ON)

Procedure
1. Switch Ignition ON and leave the key in the ignition.

2. Mechanically lock the vehicle using the Drivers door using a second
key.

3. Using the remote control press the Unlock button once, and the horn
will sound once.

4. Wait 6 seconds and press the unlock button once to activate the coding
procedure. The remote control will now be programmed.

NOTE : When performing programming on additional remotes the procedure
is the same, except you press the unlock button 2, 3 or 4 times for the
different remote.

For example : If programming 2 remotes press the unlock button twice with
a 1 second interval between each press, repeat for 3 and 4 remotes.

5. Switch Ignition OFF.

6. Remove key from ignition and check for operation.

7. The coding procedure can be repeated up to 4 times for additional remotes.

8. The ignition must be switched OFF between programming each remote
control.

Remote Control Erasing (1997 ON)

Procedure
1. Switch Ignition ON and leave the key in the ignition.

2. Mechanically lock the vehicle using the Drivers door using a second
key.

3. Press the remote control unlock button 5 times in 1 second intervals.
A short horn will sound.

4. Wait 6 seconds and press the unlock button once to activate memory
erase.

5. Switch ignition OFF, all remotes are now erased.