S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Keyless Start

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Old 10-18-2020, 05:15 AM
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2008 W221 L
Question Keyless Start

Hi All,

Got a strange question. I have a 2008 W221 320L which has Keyless Go (lock and unlock from the exterior handles) but am unsure if it has Keyless Start also.

There were no Start Buttons supplied when purchased. So any ideas would be welcome.
Old 10-18-2020, 09:05 AM
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2008 S550 AMG Sport
Keyless start

You need the button for it to be keyless start. The button is normally inserted into the ignition switch, you will have to insert the key and start it the old fashioned way into you purchase it.
Old 10-18-2020, 11:07 AM
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S500
someone probably took it out to reduce likelyhood of theft, uninsurable in some countries.... additional immobilisers are a sensible precaution
Old 10-18-2020, 03:02 PM
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2008 W221 L
Cheers for the reply folks. It's just when i look at say Ebay for the button it only lists S550 from my year and not my loser diesel. I also had a look on youtube and one video shows the key in the car and you can push the ignition barrel in without the button and his car started.

Obviously i do want a button, but don't want to waste anyone's time ordering one then returning the item if it doesn't work.
Old 10-19-2020, 02:58 PM
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S500
….. the button pops out and you can exchange for the key (if the key has a flat battery / car having a moment etc.)

not sure if they are coded to the car. I guess they must be or does it just relay the car key info to the button.... I thought I read keyless go keys are different to stock ones.
Old 10-19-2020, 03:05 PM
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Depends on the weather
I have used the same button in different cars and it works because I wanted to know that a few years ago. There was no coding needed, only the key in the car. I may still have the button somewhere with some car parts. I'll see if I can find it.
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Old 10-19-2020, 06:56 PM
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2008 W221 L
Once again folks i really appreciate the responses. I have been on with the dealership, given them my VIN, and they have assured me that they have the button in stock and that it will function correctly within my vehicle, even though the cheapo buttons on Amazon and eBay say it won't. Going to pick it up tomorrow and will let you all know how it goes. Phewwwww....CHEERS!!!!
Old 10-20-2020, 04:03 PM
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2008 W221 L
Got the button from MB Dealership and it works a treat, no hastle, no faffing, just plug and play!!!
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