My sort of broken W221 S600
Discussion
If you are getting errors on all speed sensors it may well be the abs unit. They do go wrong.
You could try unplugging the multi connector from the main abs controller and spraying contact cleaner on the pins and reconnecting. Can sometimes help. If not the abs unit might need rebuilding.
Depending on the model year it might also have a second battery behind the back seat. If these start to go bad it can cause all sorts of odd electrics
You could try unplugging the multi connector from the main abs controller and spraying contact cleaner on the pins and reconnecting. Can sometimes help. If not the abs unit might need rebuilding.
Depending on the model year it might also have a second battery behind the back seat. If these start to go bad it can cause all sorts of odd electrics
Mikedknight said:
Misfire update. It still has one. It was only misfiring on one cylinder (cyl 7) so thought I’d do the spark plugs. The last time they’d been done was in 2012 30k ago.
Replaced them all with 24 NGK iridium’s which didn’t fix the issue so I’ve ordered the left coil pack. On further reading of the service history it turned out the spark plugs had been changed last year less than 1000 miles ago! Doh.
To be fair, I've chased my tail before over a misfire and excluded the (obvious) of it being a spark plug "because I'd just changed them"... They can and do fail and sometimes you get DOA ones even with reputable brands. Replaced them all with 24 NGK iridium’s which didn’t fix the issue so I’ve ordered the left coil pack. On further reading of the service history it turned out the spark plugs had been changed last year less than 1000 miles ago! Doh.
So while yes it's annoying that they were only done 1000 miles ago it still could have been them (just a shame it wasn't).
Good news on the 320cdi, I also have a 320cdi that is full of soil in the same place.
On to the 600 replaced the left coil pack and all was well until the EML lit up again. This time the codes are banging on about the voltage transformer but weirdly the live data isn’t showing any misfires.
I guess I need to buy a voltage transformer too. I’m not touching it for a couple of weeks now but I’ll report back my findings.
On to the 600 replaced the left coil pack and all was well until the EML lit up again. This time the codes are banging on about the voltage transformer but weirdly the live data isn’t showing any misfires.
I guess I need to buy a voltage transformer too. I’m not touching it for a couple of weeks now but I’ll report back my findings.
This cars faults have taken a sort of funny turn. The abs traction heavy steering fault comes and goes. But I had a new and exciting fault yesterday. Waiting in traffic individual suspension struts started raising on their own in the most aggressive style. Sort of like one of those LA lowriders. Accompanied by an ABC fault message on the screen. Did it for maybe 30 seconds and then stopped again.
So many weird problems with this car, anyone got any ideas? Some kind of earth fault? Dodgy alternator? Sam unit? At times it drives completely perfectly with no errors and everything working.
So many weird problems with this car, anyone got any ideas? Some kind of earth fault? Dodgy alternator? Sam unit? At times it drives completely perfectly with no errors and everything working.
Good idea re the dehumidifier. I’ve pulled the carpet and it’s bone dry underneath. I cleared all the codes on the car and took it out for a drive. I drove very sedately for about an hour and a half. No warning lights or any other electrical issues.
I wonder if the electrical issues only occur when the car uses the second bank of cylinders/coil pack?
Would it be possible that the voltage transformer is sending out spikes of electricity and messing with various systems? The faults are so random.
I wonder if the electrical issues only occur when the car uses the second bank of cylinders/coil pack?
Would it be possible that the voltage transformer is sending out spikes of electricity and messing with various systems? The faults are so random.
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