SL/R230: 2007 550 Intermittent Starting
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Joined: Aug 2021
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SL 550
2007 550 Intermittent Starting
My 2007 MBZ SL 550 is well maintained and I've had my car for two years now and recently, I stopped at a gas station to fill up and I went to start up the engine and I got a whirring noise, all lights and indicators worked, but the engine wasn't cranking. AAA towed me to my mechanic after biz hours and the next morning my mechanic called me to ask what the problem was. The car had started for him. After running diagnostics, he changed the battery in the starter. A week later (at the same gas station) and stranded motorist asked for a jump. I helped him out, got him started and then my car wouldn't start. After 15 minutes, it started. A week after I was visiting my parents and the car (after sitting in their garage for 3 hours) would not start at all. Again I towed it to my mechanic. He couldn't figure out the problem but suggested I use the original Key Fob. I replaced the battery in the key fob hoping to fix the issue -no result. I'm hesitant to drive and get stranded
Last edited by dbattifora; Sep 17, 2021 at 09:08 PM.
My 2007 MBZ SL 550 is well maintained and I've had my car for two years now and recently, I stopped at a gas station to fill up and I went to start up the engine and I got a whirring noise, all lights and indicators worked, but the engine wasn't cranking. AAA towed me to my mechanic after biz hours and the next morning my mechanic called me to ask what the problem was. The car had started for him. After running diagnostics, he changed the battery in the starter. A week later (at the same gas station) and stranded motorist asked for a jump. I helped him out, got him started and then my car wouldn't start. After 15 minutes, it started. A week after I was visiting my parents and the car (after sitting in their car for 3 hours) would not start at all. Again I towed it to my mechanic. He couldn't figure out the problem but suggested I use the original Key Fob. I replaced the battery in the key fob hoping to fix the issue -no result. I'm hesitant to drive and get stranded
Out Of Control!!
Joined: Sep 2018
Posts: 14,663
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From: unbegrenzt
2017 GLE350 4MATIC
My 2007 MBZ SL 550 is well maintained and I've had my car for two years now and recently, I stopped at a gas station to fill up and I went to start up the engine and I got a whirring noise, all lights and indicators worked, but the engine wasn't cranking. AAA towed me to my mechanic after biz hours and the next morning my mechanic called me to ask what the problem was. The car had started for him. After running diagnostics, he changed the battery in the starter. A week later (at the same gas station) and stranded motorist asked for a jump. I helped him out, got him started and then my car wouldn't start. After 15 minutes, it started. A week after I was visiting my parents and the car (after sitting in their car for 3 hours) would not start at all. Again I towed it to my mechanic. He couldn't figure out the problem but suggested I use the original Key Fob. I replaced the battery in the key fob hoping to fix the issue -no result. I'm hesitant to drive and get stranded
Crank position sensor is a candidate.
Which scan tool do you have?
MBWorld Fanatic!
Joined: Sep 2007
Posts: 1,481
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95 SL600
If the starter motor turns the engine over and it doesn’t start I would definitely go for the crank sensor, but the post says doesn’t crank, and that’s not crank sensor.
A heated crank sensor that is about to totally fail, will not allow the engine to start after the starter has spun the engine. A bad EIS or shifter or starter motor/ solenoid relay will not allow the starter motor to turn the engine.
A heated crank sensor that is about to totally fail, will not allow the engine to start after the starter has spun the engine. A bad EIS or shifter or starter motor/ solenoid relay will not allow the starter motor to turn the engine.
Senior Member
Joined: Jun 2020
Posts: 449
Likes: 129
From: Melbourne Florida
SL500
If the starter motor turns the engine over and it doesn’t start I would definitely go for the crank sensor, but the post says doesn’t crank, and that’s not crank sensor.
A heated crank sensor that is about to totally fail, will not allow the engine to start after the starter has spun the engine. A bad EIS or shifter or starter motor/ solenoid relay will not allow the starter motor to turn the engine.
A heated crank sensor that is about to totally fail, will not allow the engine to start after the starter has spun the engine. A bad EIS or shifter or starter motor/ solenoid relay will not allow the starter motor to turn the engine.
