# Can I buy an easy stop and start button for 2002 Mercedes-Benz S-Class? **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** mercedes-benz, s-class\ **Created:** [March 30, 2018, 11:33pm UTC](https://community.cartalk.com/t/can-i-buy-an-easy-stop-and-start-button-for-2002-mercedes-benz-s-class/114742 "2018-03-30T23:33:17Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![casperlafata](https://avatars.discourse-cdn.com/v4/letter/c/e56c9b/32.png) [@casperlafata](https://community.cartalk.com/u/casperlafata)\ **Post date:** [March 30, 2018, 11:33pm UTC](https://community.cartalk.com/t/can-i-buy-an-easy-stop-and-start-button-for-2002-mercedes-benz-s-class/114742/1 "2018-03-30T23:33:17Z")
I want to know if I can purchase a easy stop and start button on my 2002 s500 Mercedes, ---
**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\ **Post date:** [March 31, 2018, 9:30pm UTC](https://community.cartalk.com/t/can-i-buy-an-easy-stop-and-start-button-for-2002-mercedes-benz-s-class/114742/2 "2018-03-31T21:30:04Z")
Do you mean a push button ignition or a stop/start feature when you stop for a traffic light? ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [March 31, 2018, 9:33pm UTC](https://community.cartalk.com/t/can-i-buy-an-easy-stop-and-start-button-for-2002-mercedes-benz-s-class/114742/3 "2018-03-31T21:33:02Z")
Nothing ‘easy’ about it, in my opinion. One of the most complex electrical systems on the planet. I wouldn’t mess with it. ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [April 1, 2018, 2:00am UTC](https://community.cartalk.com/t/can-i-buy-an-easy-stop-and-start-button-for-2002-mercedes-benz-s-class/114742/4 "2018-04-01T02:00:35Z")
A push button to operate the starter is relatively easy. A stop/start feature is very difficult if not impossible. I think you may open up a huge can of worms with either option. ---
**Author:** ![shadowfax](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shadowfax/32/13026_2.png) [@shadowfax](https://community.cartalk.com/u/shadowfax)\ **Post date:** [April 1, 2018, 4:35am UTC](https://community.cartalk.com/t/can-i-buy-an-easy-stop-and-start-button-for-2002-mercedes-benz-s-class/114742/5 "2018-04-01T04:35:32Z")
If you don’t already have a start/stop then you will need to put the key in the ignition, turn it to “on” and then press the start button. That’s how the old Honda S2000’s did it, too. The other way is to disable the steering wheel lock, then hope that the car can detect your key when it’s not in the ignition. ---
**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\ **Post date:** [April 1, 2018, 1:17pm UTC](https://community.cartalk.com/t/can-i-buy-an-easy-stop-and-start-button-for-2002-mercedes-benz-s-class/114742/6 "2018-04-01T13:17:50Z")
It should be possible to replace the key ignition system with a start/stop button. A full implementation would require a proximity sensor to recognize that the key fob is nearby. If the original ignition still remains in the car, the steering wheel lock must be disabled. If the steering wheel lock remains enabled, the key must be turned to release it. That is just like using the keyed ignition, and I see no compelling reason the use a stop/start button. ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [April 1, 2018, 2:13pm UTC](https://community.cartalk.com/t/can-i-buy-an-easy-stop-and-start-button-for-2002-mercedes-benz-s-class/114742/7 "2018-04-01T14:13:27Z")
I’m curious. What is the benefit of such a button for you? ---
**Author:** ![shadowfax](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shadowfax/32/13026_2.png) [@shadowfax](https://community.cartalk.com/u/shadowfax)\ **Post date:** [April 1, 2018, 2:16pm UTC](https://community.cartalk.com/t/can-i-buy-an-easy-stop-and-start-button-for-2002-mercedes-benz-s-class/114742/8 "2018-04-01T14:16:12Z")
> [@jtsanders](#): > > A full implementation would require a proximity sensor to recognize that the key fob is nearby. It would also need to hook into the brake light switch. No brake = “on/acc,” brake = “start.” And if OP’s is the kind of system where you have to hold the key in start until it starts, they will also need to figure out how to make the starter disengage once the engine is started.