1995 S420 misfire - looking for coil replacement DIY
Thread Starter
Newbie
Joined: Jul 2008
Posts: 9
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03 ML500
1995 S420 misfire - looking for coil replacement DIY
Please, help.
95 s420 w/ 65,000 miles
Engine sputters idle, bad exhaust rotten egg smell
Did spark plus, rotors/distributors 5,000 miles ago
Suspect coil gone bad, where is it located at ?..did search w/ no luck
Your help/input would be much appreciated !
95 s420 w/ 65,000 miles
Engine sputters idle, bad exhaust rotten egg smell
Did spark plus, rotors/distributors 5,000 miles ago
Suspect coil gone bad, where is it located at ?..did search w/ no luck
Your help/input would be much appreciated !
Member
Joined: Jul 2006
Posts: 100
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From: Phoenix, AZ
400E
There's two coils, one for each distributor cap. They are down by the ABS pump, front/left of the engine compartment. Follow the coil wires from the distributor caps. But it's quite unlikely that you have a coil failure at that mileage, or double that mileage. Better to start by reading the fault codes on the 38 pin connector in the engine compartment.
Thread Starter
Newbie
Joined: Jul 2008
Posts: 9
Likes: 0
03 ML500
Thank you very much for the prompt reply, I found both of them this morning, one of them appears to be located in a place almost impossible to get to w/o removing the headlight assembly
I unplugged each one from the distributor cap, then made an attempt to start the engine.
I managed to start the engine w/ only one plugged-in. It ran smoother w/ no power. I suspect the one that's gone bad is the one I couldn't start the engine w/ ?...it's the one located in a very hard place to access
Am I on the right path ?
Am I
I unplugged each one from the distributor cap, then made an attempt to start the engine.
I managed to start the engine w/ only one plugged-in. It ran smoother w/ no power. I suspect the one that's gone bad is the one I couldn't start the engine w/ ?...it's the one located in a very hard place to access
Am I on the right path ?
Am I
Member
Joined: Jul 2006
Posts: 100
Likes: 0
From: Phoenix, AZ
400E
Hard to say for sure. Could be a problem with a spark plug wire or two, or one of the coil wires. You can interchange the coils if you wish - they are the same except for the mounting schemes. I'd still start with the fault codes. Your car has one of the all time great DIY fault code reading systems. Can you just remove the back cover of the headlight?
