W221 2010 S400 Hybrid w intermittent no start
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Newbie
Joined: Nov 2019
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2010 Mercedes s400
W221 2010 S400 Hybrid w intermittent no start
I have just purchased a 2010 S400 hybrid and it was fine and drove for about 40 miles from dealership before parking it on my driveway. The next evening my wife and I decided to go take it out and it would not start. Lights and everything would go on as if it was on accessory, but the engine was off and it didnt say ready on the dash. We left it after several attempts and a half hour later we tried to start and it worked. The following day I took it to work and had no issues. Was it just a fluke? I looked at service records and from 2015 to 2018 it has been serviced and electronics checked. I couldnt figure out if the dealership replaced the power electronics module that apparently had a recall at some point. That's my story and so far it's working but will keep you posted. I'm bummed out that I bought the hybrid not knowing it would cost more to repair than if I had just bought a regular s class.
Super Member
Joined: May 2019
Posts: 671
Likes: 288
From: Omaha, NE
2007 S600
No clue if this could be related to your issue or not, but...
My S600 has Keyless-Go. MOST of the time you get in, push the brake pedal, hit the button, and it purrs to life. All good. Once in a while, totally at random, you press the brake, push the button, the dash light sup, and... nothing. No engine start. I fought this for a while, even replaced the starter thinking it could be a bad starter relay. Nope. Apparently it's a Keyless-Go issue. If I pull the KG button and use the key, it's an instant start, every time, no matter what. If using the KG button, sometimes it starts immediately. Sometimes you just have to hold the button in for anywhere from (again, totally random) a second or so, to as much as 4-5 seconds before it starts.
I'm sure it could be fixed. I'm equally sure I don't want to pay the bill that would come with fixing it. Since I know the workaround, it's a minor thing. Again, maybe not at all related to what you're seeing, but it might be something to try.
My S600 has Keyless-Go. MOST of the time you get in, push the brake pedal, hit the button, and it purrs to life. All good. Once in a while, totally at random, you press the brake, push the button, the dash light sup, and... nothing. No engine start. I fought this for a while, even replaced the starter thinking it could be a bad starter relay. Nope. Apparently it's a Keyless-Go issue. If I pull the KG button and use the key, it's an instant start, every time, no matter what. If using the KG button, sometimes it starts immediately. Sometimes you just have to hold the button in for anywhere from (again, totally random) a second or so, to as much as 4-5 seconds before it starts.
I'm sure it could be fixed. I'm equally sure I don't want to pay the bill that would come with fixing it. Since I know the workaround, it's a minor thing. Again, maybe not at all related to what you're seeing, but it might be something to try.
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,630
From: North Scottsdale, AZ
'71 Pinto
I assume MB dealer, best to have them check it and confirm there are no outstanding service campaigns even if no fault codes are found and/or no trouble found you will have invoice documentation of complaint in the event it happens again / more frequently.
Newbie
Joined: Jul 2020
Posts: 3
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SL500 and S400
I have just purchased a 2010 S400 hybrid and it was fine and drove for about 40 miles from dealership before parking it on my driveway. The next evening my wife and I decided to go take it out and it would not start. Lights and everything would go on as if it was on accessory, but the engine was off and it didnt say ready on the dash. We left it after several attempts and a half hour later we tried to start and it worked. The following day I took it to work and had no issues. Was it just a fluke? I looked at service records and from 2015 to 2018 it has been serviced and electronics checked. I couldnt figure out if the dealership replaced the power electronics module that apparently had a recall at some point. That's my story and so far it's working but will keep you posted. I'm bummed out that I bought the hybrid not knowing it would cost more to repair than if I had just bought a regular s class.
What was the outcome? Does the car still do it periodically?
Newbie
Joined: Oct 2007
Posts: 10
Likes: 1
From: Zhuhai
S400
