2007 S550 wont start at all.
Thread Starter
Junior Member
Joined: Jul 2014
Posts: 34
Likes: 1
Benz S550
2007 S550 wont start at all.
I have an 07 s550 with keyless start. I drove it all day, parked and went into a store for 5 mins, got back in the car and it won't start! I removed the starter battery(under the hood) and took it to advance auto and had it charged overnight.
Upon reinstalling the battery, the car still won't start. All electronics and lights on dash board are working. I also noticed the car makes a "thump" sound, coming from the trunk area whenever I try to start it.
What could be the cause? What should I check first? Please help. Thanks
Upon reinstalling the battery, the car still won't start. All electronics and lights on dash board are working. I also noticed the car makes a "thump" sound, coming from the trunk area whenever I try to start it.
What could be the cause? What should I check first? Please help. Thanks
Super Member
Joined: Oct 2007
Posts: 643
Likes: 51
From: Southern California
2007 CL550
Call Mercedes roadside assistance. For your model year vehicle, they will come out for free and try to diagnose the problem. They come out with a supply of batteries and if the battery is the problem, they will offer to sell you one at the standard dealer price. The starter battery is a size that is not usually available at auto parts stores.
Thread Starter
Junior Member
Joined: Jul 2014
Posts: 34
Likes: 1
Benz S550
They checked the volt on the battery with a multimeter and the battery seems fine. I suspect it might be a relay. Does anyone know which relays might preventing the car from starting? thanks
Thread Starter
Junior Member
Joined: Jul 2014
Posts: 34
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Benz S550
so i noticed fuse #9 (in the prefuse box) was blown and changed it. I started the car but as soon as i turned it off and try to restart it again it wont start. I checked fuse #9 and its blown again. What could be the reason why fuse #9 keeps blowing?
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Joined: Nov 2015
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From: Newcastle, WA
2019 S63 4Matic+, 2018 E400 Cabrio, wardens car.
Go to your local drug store and buy a large jar of Vaseline, and then have the car towed to the dealer. Be prepared to use the Vaseline upon diagnosis.
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MBWorld Fanatic!
Joined: Mar 2008
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From: Vancouver, BC
CLS55 AMG
is the car cranking and not starting? or it won't crank at all? Mine died a couple weeks ago while driving. Turned out to be a dead fuel pump, car would just keep cranking and not fire.
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Joined: Jul 2018
Posts: 1
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Mercedes s 550
I have an 07 s550 with keyless start. I drove it all day, parked and went into a store for 5 mins, got back in the car and it won't start! I removed the starter battery(under the hood) and took it to advance auto and had it charged overnight.
Upon reinstalling the battery, the car still won't start. All electronics and lights on dash board are working. I also noticed the car makes a "thump" sound, coming from the trunk area whenever I try to start it.
What could be the cause? What should I check first? Please help. Thanks
Upon reinstalling the battery, the car still won't start. All electronics and lights on dash board are working. I also noticed the car makes a "thump" sound, coming from the trunk area whenever I try to start it.
What could be the cause? What should I check first? Please help. Thanks
Newbie
Joined: Jul 2018
Posts: 8
Likes: 1
S550
I know this is an older thread but did you ever find the exact problem??
I have an 07 s550 with keyless start. I drove it all day, parked and went into a store for 5 mins, got back in the car and it won't start! I removed the starter battery(under the hood) and took it to advance auto and had it charged overnight.
Upon reinstalling the battery, the car still won't start. All electronics and lights on dash board are working. I also noticed the car makes a "thump" sound, coming from the trunk area whenever I try to start it.
What could be the cause? What should I check first? Please help. Thanks
Upon reinstalling the battery, the car still won't start. All electronics and lights on dash board are working. I also noticed the car makes a "thump" sound, coming from the trunk area whenever I try to start it.
What could be the cause? What should I check first? Please help. Thanks
