Keys on my s55 wont start the engine but open and close the doors,it starts with the keyless card

In fact, when the ignition kill is activated, not even the ignition key starts the car. ... Then turn the ignition off and attempt to start the engine. ... system allows the driver to unlock the doors or trunk lid from outside of the vehicle without using a key.

The transponder is not effective any longer sometimes the battery of the remote is very low which needs to be replaced

If you need to be that close to the car to start , you still have a bad to low battery.,You notice that you had to get close to it.If you are sure absolutly have a new battery enter the car put key in regular position leave key in for 2 minutes cylce it off there see if it will start back in it normal range.

if its the ignition key it must be done by a dealer and have a lage black plastic head which has got a transponder in it. If you got a blank key cut at the locksmith it will turn the locks but wont start the car. Usually you get the dealer to do both supply ignition key and then get it cut, then they can program it.

but if your asking how to program the keyless entry remote follow this procedure.
take note step 5 is different for different year models.

Make sure that all the doors are closed and unlocked and wait for dome light to go out before starting.

Insert the ignition key into the ignition switch

Open drivers door

3 on/lock

Close/open drivers door

Wait 8 secs

On/lock/on (MY06-07) OR 2 on/lock OR on/lock (MY08)

Close drivers door

Hazards flash

Press remote & keep pressing one button & then the other slowly(2 secs) until locks start working(they wont operate if key is in ignition).

Hazards flash

Use the driver's door key cylinder> Lock and unlock the car with the key after all doors are closed and this should solve the problem. If not, then it has nothing to do with the RKE Transmitter.

dealer only

Get into your passport and unlock all doors. Leave drivers door open. Put key into ignition. Turn to ON (not start), then OFF three times within 5 seconds. Close and open the drivers door twice. Turn key to ON then OFF 5 times within 5 seconds. Close then open the drivers door. Press either the lock or unlock button on the remote. Doors will lock then unlock. Press the button again. Doors will lock then unlock again. Close door to finish programming. If it doesnt work, try it again but turn the key faster. You have to do it all pretty quick, but I had it done on the second try.

Try this:

key not in ignition.
driver door open-others closed
driver door unlocked

1-insert and remove key from ignition two times

2-close and open driver door two times

3-insert and remove key once from ign.

4-close and open drvr door twice

5-insert key into ign.,then close driver door

6-turn key to on (not start) then off, twice
this is rewrite mode,have all remotes to reprogram
it will clear any lost remotes.

7-remove key from ignition,the door locks should cycle twice.if not start over.it may take a few tries.

8-press lock/unlock together and hold for a second

9-release,and press lock on remote,the door locks will cycle confirming program.continue to do other remotes you have,steps 8 and 9.if only one in possesion,you are done.

to end mode open door or insert key into ig.you can do up to 4 remotes.read this a couple of times to get the sequence down.there are time restraints,but if you go in order it will work.do not wait more than a second b/t each step and you will be ok.i know from experience that you can do this as fast as you can and it will enter mode.if steps out of order or you wait to long it wont.print this and have in lap,read ahead of what you are doing.good luck.

Open the remotes up...Are the boards the same...?