2005 S55 AMG no start when hot
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Joined: Aug 2018
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'05 S55
2005 S55 AMG no start when hot
Hello all,
Noob here. I bought a 2005 S55 AMG this past October 2017 with 75K miles. I love the car. Interior looks like it has never been sat in. A friend has 3 AMGs (s65, sl55, cl65) and I fell in love with them and bought one of my own.
Lately it has developed a "hard to start/no start" problem when hot. If the car is hot (i.e., operating temp) and it sits for up to 15-20 minutes, it cranks hard but takes a few seconds to start. If the hot car sits for half hour or so, it will crank hard but will not fire and start. After sitting for a while and cooling (couple hours), it will start fine and very quick just like a cold start. My searching has led me to suspect the Crankshaft Position Sensor.
Sound about right?
Thanks,
Noob here. I bought a 2005 S55 AMG this past October 2017 with 75K miles. I love the car. Interior looks like it has never been sat in. A friend has 3 AMGs (s65, sl55, cl65) and I fell in love with them and bought one of my own.
Lately it has developed a "hard to start/no start" problem when hot. If the car is hot (i.e., operating temp) and it sits for up to 15-20 minutes, it cranks hard but takes a few seconds to start. If the hot car sits for half hour or so, it will crank hard but will not fire and start. After sitting for a while and cooling (couple hours), it will start fine and very quick just like a cold start. My searching has led me to suspect the Crankshaft Position Sensor.
Sound about right?
Thanks,
Super Member
Joined: Jan 2006
Posts: 579
Likes: 37
Hello all,
Noob here. I bought a 2005 S55 AMG this past October 2017 with 75K miles. I love the car. Interior looks like it has never been sat in. A friend has 3 AMGs (s65, sl55, cl65) and I fell in love with them and bought one of my own.
Lately it has developed a "hard to start/no start" problem when hot. If the car is hot (i.e., operating temp) and it sits for up to 15-20 minutes, it cranks hard but takes a few seconds to start. If the hot car sits for half hour or so, it will crank hard but will not fire and start. After sitting for a while and cooling (couple hours), it will start fine and very quick just like a cold start. My searching has led me to suspect the Crankshaft Position Sensor.
Sound about right?
Thanks,
Noob here. I bought a 2005 S55 AMG this past October 2017 with 75K miles. I love the car. Interior looks like it has never been sat in. A friend has 3 AMGs (s65, sl55, cl65) and I fell in love with them and bought one of my own.
Lately it has developed a "hard to start/no start" problem when hot. If the car is hot (i.e., operating temp) and it sits for up to 15-20 minutes, it cranks hard but takes a few seconds to start. If the hot car sits for half hour or so, it will crank hard but will not fire and start. After sitting for a while and cooling (couple hours), it will start fine and very quick just like a cold start. My searching has led me to suspect the Crankshaft Position Sensor.
Sound about right?
Thanks,
Johan
MBWorld Fanatic!
Joined: Apr 2009
Posts: 1,259
Likes: 363
'06 MB S55 AMG; '04 Audi Allroad 4.2; '05 BMW M3 Conv.; '92 MB 500E
Same here on my ‘06, beginning around 100k Miles, would have a sporadic extended crank. Threw a CPS at it for kicks, no change. But it was sporadic so it didn’t bother me. Eventually the fuel pump revealed itself as the problem. Since either can leave you stranded, I’d do a CPS, fuel pump and fuel filter. But first to be sure, do what DRTYLNDY says and check fuel pressure during the no start condition.
GL
Maw
GL
Maw
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'05 S55
Dropped the S55 off at dealer yesterday evening and the mechanic had the new CPS sensor in his hand. He may need to keep the car for a couple of days because it has developed a really noisy squeaking/creaking from the front left suspension. He doesn't think its a ball joint, but he has heard it and is going to address that issue as well. I hope the new CPS resolves the no start. I will keep you posted
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MBWorld Fanatic!
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'06 MB S55 AMG; '04 Audi Allroad 4.2; '05 BMW M3 Conv.; '92 MB 500E
Sounds like ball joints to me. Mine started making noise last fall, replaced this spring when I brought the car back out. GL, keep us posted. Do not, I repeat DO NOT let the dealer “hunt and peck” on your car. You won’t be happy with the service or the car at the end of that process. Better to tell those guys what to do, than ask them what they think they should do. ABC related matters is about all I let the dealer do, because I want them on the hook for it. Even then, I tell them what to do.
Cheers,
maw
Cheers,
maw
Last edited by maw1124; Aug 8, 2018 at 10:05 AM.
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'05 S55
The mechanic told me the car is ready. He's says it will start "sometimes all the time now". He's a pretty funny guy. He's also a pretty busy guy and I haven't had a chance to talk with him about the suspension squeaking/creaking issue but will find out this evening when i pick up the car. I will keep you posted.
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From: Phoenix
222 S-65
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'05 S55
I told the mechanic about "Diagnostic Dice" and we had a good laugh while he told me of several customer-related diagnostic disasters over the years. So I the car back last night, and it is starting and running exquisitely. The new CPS sensor seems to have fixed the "no start when hot" issue i was having. The suspension squeaking was caused caused by a bushing and he lubed it up and now it is quiet as a mouse!
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'05 S55
I will ask the mechanic which bushing was squeaking specifically. When I asked him the other day what was squeaking in the front, he simply replied "bushing" LOL
With the new CPS sensor the car is starting flawlessly
With the new CPS sensor the car is starting flawlessly
