Turn key no sound
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Junior Member
Joined: Nov 2020
Posts: 68
Likes: 6
W221 S class 550
Turn key no sound
Got in the car turned the key and it sounded like the battery didnt have enough juice. Tried it again didnt make a sound.lights and dash light up. My scanner battery said it had 12.4. I removed the amplifier about 2 hours prior and put it back in just before this symptom happened. So I thought maybe I did something in the trunk. So I unhooked it and turn key no sound.dash lights up. I also noticed when i put the key in position 1 and 2 it says take your key from ignition... does anyone know what this could be.. please help
Super Member
Joined: Jul 2014
Posts: 992
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From: Tucson, AZ
'20 X5 M50i; '17 Ram 3500; Golf Cart; Bikes; Scooters
I don't see the year of your car, but I believe the W221 all have 2 batteries...one in the trunk for the cabin and features, and one near the engine for engine starting only.
Both must be up to voltage to operate properly.
Sounds like the trunk battery is good. Check the engine battery next.
Both must be up to voltage to operate properly.
Sounds like the trunk battery is good. Check the engine battery next.
Thread Starter
Junior Member
Joined: Nov 2020
Posts: 68
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W221 S class 550
2011 s550 4matic
Hey thanks for the reply where is the battery located in the trunk is it directly behind the seat or is it on the passenger side of the trunk? I haven't checked the battery voltage in the trunk but I do know the battery under the hood was at 12.4 at the time.
about a month ago my car made the same strange sound as if it didn't have enough juice so I turn the key back and then turned it again and it fired right up.
also I had someone use a jumper wire at the starter relay see if the starter will turn over and there was no sound
about a month ago my car made the same strange sound as if it didn't have enough juice so I turn the key back and then turned it again and it fired right up.
also I had someone use a jumper wire at the starter relay see if the starter will turn over and there was no sound
Thread Starter
Junior Member
Joined: Nov 2020
Posts: 68
Likes: 6
W221 S class 550
2011 s550 4matic
Hey thanks for the reply where is the battery located in the trunk is it directly behind the seat or is it on the passenger side of the trunk? I haven't checked the battery voltage in the trunk but I do know the battery under the hood was at 12.4 at the time.
about a month ago my car made the same strange sound as if it didn't have enough juice so I turn the key back and then turned it again and it fired right up.
also I had someone use a jumper wire at the starter relay see if the starter will turn over and there was no sound
about a month ago my car made the same strange sound as if it didn't have enough juice so I turn the key back and then turned it again and it fired right up.
also I had someone use a jumper wire at the starter relay see if the starter will turn over and there was no sound
Super Member
Joined: Jul 2014
Posts: 992
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From: Tucson, AZ
'20 X5 M50i; '17 Ram 3500; Golf Cart; Bikes; Scooters
The rear battery is behind the vertical upholstery panel at the front of the trunk.
Pull the panel starting at the sides or bottom to access the battery.
The starter could be bad, but you need to confirm it has power to it, and connections are good, plus run all the checks, before replacing it.
To be honest, it will be best to run a Star Diagnostics Scan (SDS) to properly determine where to find the problem.
Pull the panel starting at the sides or bottom to access the battery.
The starter could be bad, but you need to confirm it has power to it, and connections are good, plus run all the checks, before replacing it.
To be honest, it will be best to run a Star Diagnostics Scan (SDS) to properly determine where to find the problem.
Thread Starter
Junior Member
Joined: Nov 2020
Posts: 68
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W221 S class 550
It was the starter...tested it and no response. Did the same to the new one and it came on...also I had to replace my battery...I installed the new starter..it was work to do the starter, not enough clearance on the jack stands but was workable...my motivation was thinking about the dealer fee to fix. But still having the same issue.. no crank sound but lights work....I just dont know what's next...please help!!! Thanks
Junior Member
Joined: Dec 2020
Posts: 16
Likes: 6
From: Newport Beach, CA
2011 Range Rover SC Autobiography Black Edition
Hi Cuzzo,
As kbob999 said, it would be beneficial to know the year of your W221 S-Class to help understand what may be going on. As I understand it, the 2007-2008 W221 has a battery located in the engine compartment and another in the trunk. The 2009-2013 W221 has a battery in the engine compartment and another in the dashboard.
You mention that you have replaced the starter and the battery, but you have not specified which battery you replaced. If I assume you have a 2007-2008 W221 and have replaced the battery located in the trunk—that would explain why your vehicle is not cranking, although the lights work. The trunk battery is designated as the on-board electrical system battery and only supplies the car's electrical consumers—the battery in the engine compartment supplies the starter and alternator cable.
If I correctly understood your situation, you will need to replace the starter battery. It is a 12-volt, 35 AH, group 49 battery, and the OEM part number is A 230 541 00 01. Otherwise, we will need more information about your vehicle to understand what is going on.
As kbob999 said, it would be beneficial to know the year of your W221 S-Class to help understand what may be going on. As I understand it, the 2007-2008 W221 has a battery located in the engine compartment and another in the trunk. The 2009-2013 W221 has a battery in the engine compartment and another in the dashboard.
You mention that you have replaced the starter and the battery, but you have not specified which battery you replaced. If I assume you have a 2007-2008 W221 and have replaced the battery located in the trunk—that would explain why your vehicle is not cranking, although the lights work. The trunk battery is designated as the on-board electrical system battery and only supplies the car's electrical consumers—the battery in the engine compartment supplies the starter and alternator cable.
If I correctly understood your situation, you will need to replace the starter battery. It is a 12-volt, 35 AH, group 49 battery, and the OEM part number is A 230 541 00 01. Otherwise, we will need more information about your vehicle to understand what is going on.
Best regards,
Christopher
Christopher
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Junior Member
Joined: Dec 2020
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From: Newport Beach, CA
2011 Range Rover SC Autobiography Black Edition
Cuzzo: Ok my 2011 W221 had a no crank sound problem one day..all lights come on but nothing when u turn the key. I figured it was the starter. So I took the starter out and tested it and the solenoid was bad. I tested the new one before I installed it and the new one came on.. ok I installed the new starter and purchased a new battery because the battery had died on me a week prior from trying to figure out the problem ( doors open, using scan tool) battery had a dead cell..so changed the starter and battery and still having the same problem.. no cranking sound but lights are working...need help!! What could this be?
It may also be necessary to inspect fuses, relays, and connections at the battery terminals.
Christopher
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Thread Starter
Junior Member
Joined: Nov 2020
Posts: 68
Likes: 6
W221 S class 550
2011 s550 4matic
Ok had someone turn the key while I listen under the hood...I hear the relay and then I hear the starter make a noise..a click and a sound like it's on but wont turn over ...I did verify the new starter worked before installing...what could this be? Is a wire crossed or touching ground...I was thinking maybe unhooking the starter from the motor and see if it turns and check the voltage before I take it out..haven't had any problems before the previous starter went out....thanks for any help. Does anyone know the color of the starter wire at the fuse box..I know its getting power but not turning over...
Member
Joined: Nov 2020
Posts: 129
Likes: 16
From: UK, RHD
Bicycle, 2004 c200k
I watched diagnosedan on youtube diagnose an issue like this as a bad ground on starter motor. To prove it, he connected a jump lead from the negative of the battery to the ground of the starter (please be careful, the body of the starter was ground on the vehicle he was testing). He then turned the key and the car started , proving his theory. You should try that 
heres the video if you're interested
So in this situation, the starter is grounded to the transmission, which is grounded by a cable. that cable was broken. you have all the symptoms .... i hope you find a solution
heres the video if you're interested
So in this situation, the starter is grounded to the transmission, which is grounded by a cable. that cable was broken. you have all the symptoms .... i hope you find a solution
Last edited by DjaKRAbb; Dec 18, 2020 at 11:13 PM.
Thread Starter
Junior Member
Joined: Nov 2020
Posts: 68
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W221 S class 550
Wow great that looks exactly like my issue..I'm going to do that as soon as I can.. thanks alot I was trying to find a video like this....I will let you know the results when done..
Newbie
Joined: Dec 2020
Posts: 10
Likes: 3
From: Georgia
2000 E320
Yea I’m gonna have to get the battery somewhere some how because as I said in the first post my key won’t turn in the ignition either without the battery charged-if that’s the problem-and I can jump the car because the key won’t turn or will it turn if it’s. Going to when I hook up the jumper charger? I mean will the charger/jumper put enough charger on it to maybe make the key turn?
Member
Joined: Nov 2020
Posts: 129
Likes: 16
From: UK, RHD
Bicycle, 2004 c200k
Yea I’m gonna have to get the battery somewhere some how because as I said in the first post my key won’t turn in the ignition either without the battery charged-if that’s the problem-and I can jump the car because the key won’t turn or will it turn if it’s. Going to when I hook up the jumper charger? I mean will the charger/jumper put enough charger on it to maybe make the key turn?
Goodluck in surgery and wishing you a full recovery!
Last edited by DjaKRAbb; Dec 21, 2020 at 12:34 AM.
Junior Member
Joined: Dec 2020
Posts: 16
Likes: 6
From: Newport Beach, CA
2011 Range Rover SC Autobiography Black Edition
The transmission ground wire location is near the transmission mount. If you can, drive the car up onto ramps, remove the underside protection shield below the transmission, and peer above the transmission cross-brace—where the transmission mount sits. The transmission ground wire fastens between a bolt and the mount on the driver-side. The opposite end of the wire is affixed to the frame nearby, as the wire itself is less than a foot long.
I've included an image to help you understand, but please know that the image provided depicts a base W221. However, since you have a 4MATIC variant, the mount will look different.
I hope this helps,
Christopher
Christopher
Last edited by seiltaenzerin; Dec 23, 2020 at 01:08 AM.
Thread Starter
Junior Member
Joined: Nov 2020
Posts: 68
Likes: 6
W221 S class 550
Finally
I finally had time to put the new starter in the other day the new starter was the problem it was a cheap $80 starter I went ahead and ordered the bosh starter about 200 bucks soon as I put it in it Crunk right up everything is working good now.. thanks for all the input.
now I got to get this no sound issue with the amplifier
now I got to get this no sound issue with the amplifier
Last edited by Cuzzo; Jan 29, 2021 at 10:28 AM.
