No Crank, No Start. Please help.
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Newbie
Joined: Mar 2024
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From: NC
2010 E350 Base 4door
No Crank, No Start. Please help.
Good afternoon and thank you in advance. 2010 E350 base model gasoline 4 door. Let me preface by admitting I may have done something stupid out of laziness. I attempted to "bump" the starter in order to loosen the crank bolt to replace a failed harmonic balancer. As soon as I turned the key I realized it doesn't "bump" so I turned it immediately back off. I removed the breaker bar and the socket from the crank bolt, which was not loosened. The car will not turn over at all now. All the inside stuff comes on. Non-starter noises from under hood are present . I checked the fuses in the driver's side engine compartment fuse box. I have read everything I can find on the forum and the web while away from the car. I haven't found a case of this happening to anyone else. Am I the only idiot? Lol. My hopes are that someone can tell me the first thing to look at when I get home. Is there a mega fuse of some type? I will be checking for voltage at the starter with a voltmeter. Prior to this the car was started several times and I parked it to begin the harmonic balancer replacement. Battery is fully charged and I have attempted to jump it. When the key is turned on the car will go into neutral and gear. The harmonic balancer has now been replaced and everything buttoned up. I also tried disconnecting the main battery for over 30 minutes. Thanks so much for any help.
Out Of Control!!
Joined: Apr 2019
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
quiet starter
Good afternoon and thank you in advance. 2010 E350 base model gasoline 4 door. Let me preface by admitting I may have done something stupid out of laziness. I attempted to "bump" the starter in order to loosen the crank bolt to replace a failed harmonic balancer. As soon as I turned the key I realized it doesn't "bump" so I turned it immediately back off. I removed the breaker bar and the socket from the crank bolt, which was not loosened. The car will not turn over at all now. All the inside stuff comes on. Non-starter noises from under hood are present . I checked the fuses in the driver's side engine compartment fuse box. I have read everything I can find on the forum and the web while away from the car. I haven't found a case of this happening to anyone else. Am I the only idiot? Lol. My hopes are that someone can tell me the first thing to look at when I get home. Is there a mega fuse of some type? I will be checking for voltage at the starter with a voltmeter. Prior to this the car was started several times and I parked it to begin the harmonic balancer replacement. Battery is fully charged and I have attempted to jump it. When the key is turned on the car will go into neutral and gear. The harmonic balancer has now been replaced and everything buttoned up. I also tried disconnecting the main battery for over 30 minutes. Thanks so much for any help.
Do you have positive 12V Batt at starter ?
What does your scanner report ?
Read what SAM data say as the Pre-Fuse is SAM's own extension to control.
Thread Starter
Newbie
Joined: Mar 2024
Posts: 3
Likes: 0
From: NC
2010 E350 Base 4door
Ouch, so much for a quick bump! Sorry to read that. The normal starter current surge was measured around 700A. Yours went high above that when crank would not move. Only limited by battery impedance and cables low-R. 1200A?
Do you have positive 12V Batt at starter ?
What does your scanner report ?
Read what SAM data say as the Pre-Fuse is SAM's own extension to control.
Do you have positive 12V Batt at starter ?
What does your scanner report ?
Read what SAM data say as the Pre-Fuse is SAM's own extension to control.
Thread Starter
Newbie
Joined: Mar 2024
Posts: 3
Likes: 0
From: NC
2010 E350 Base 4door
I have +12v at the starter solenoid and when the key is turned to start have +12v on the braided copper wire going into the starter. Tapping on starter had no effect. Is it a safe bet that the starter is dead? Car has 168000 miles and AFIK starter is original to car. If so maybe this was a blessing in disguise.
Out Of Control!!
Joined: Apr 2019
Posts: 11,923
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
I have +12v at the starter solenoid and when the key is turned to start have +12v on the braided copper wire going into the starter.
Tapping on starter had no effect. Is it a safe bet that the starter is dead?
Car has 168000 miles and AFIK starter is original to car. If so maybe this was a blessing in disguise.
Tapping on starter had no effect. Is it a safe bet that the starter is dead?
Car has 168000 miles and AFIK starter is original to car. If so maybe this was a blessing in disguise.
Your starter has everything to spin but doesn't.
168kMi is very fair lifespan for a starter. Double check the starter brush set: brushes too short?
Joined: Nov 2016
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From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
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2011 E550 | M273 | 4Matic NA | W212
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
I have +12v at the starter solenoid and when the key is turned to start have +12v on the braided copper wire going into the starter. Tapping on starter had no effect. Is it a safe bet that the starter is dead? Car has 168000 miles and AFIK starter is original to car. If so maybe this was a blessing in disguise.
The thick starter cable running straight from the battery ti the starter solenoid is always powered to +12V. The small wire also connected to the start solenoid is the solenoid coil power that gets +12V when you ask the car to start with the key or button.
For testing the starter you just take a test lead and connect the thick wire post to the small wire post on the start solenoid. This jumps +12V to the solenoid coil and if starter and solenoid are good the engine will crank. If not one if them is bad.
Joined: Nov 2016
Posts: 7,847
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From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
