Submariner1
Senior Member
- Joined
- Sep 3, 2016
- Messages
- 4,692
- Reaction score
- 788
- Location
- Windsor Berkshire
- Your Mercedes
- CL500 2009 5.5
I got an unwelcome call from the Dealer, the car was in there for unrelated work.
I’d dropped it off before the weekend for them to do some work on Tuesday.
When they came to move it on Tuesday it showed an “ABS and ESP Unavilable, see owners handbook”. Warning in yellow.
By the time they had moved it , this disappeared.
I have seen that 3 times in the last month.
They had a quick look at it, and it had thrown a load of conflicting fault codes, wheel sensors , axles speed sensors, steering sensors , rear sam , door sam, all undervoltages , said it couldnt move out of Park when it could.
And it said one wheel sensor reported 201 mph and the other three 0 !
Some crazy donut!
Many of the undervoltages were 11.74 to 11.25V!
Note just before I dropped it off it had a long 36 hour slow charge by my CTEK.
As a courtesy unaware of the above slow charge, they gave it a trickle charge and were surprised to see it came to full charge in under 4 hours! They thought that might take 7 or 8 hours.
And when they checked, the current drain averaged only 20 mAs. Apparrently perfectly OK.
They cleared the codes and she started beautifully with no warnings, and out of interest at no charge they quickly looked at it on STAR ... no fault codes!
They say this is indicative of a defective battery that cant hold a charge.
Some of you may have seen I have been winging that this effing “replacement” battery seems to need a top up charge every 3 days if not driven.
I had also noticed that when it was say at 12.4V it usually took about 10 hours on the CTEK to fully charge, but a couple of times had done it remarkably quickly.
(and due to this nightmare, I had been checking the CTEK was charging properly Volts and Amps).
The fault codes they got were pretty much all the codes I got when the new battery was installed last year. These codes disappeared when they replaced it with this one!
Coincidence .. I am sceptical about coincidences! Strangely their manufacturing dates are withing a few weeks!
The technician said that officially I should book it in for a full battery test, and if it failed then there would be no charge and a free replacement battery!
I do recall the initial “defective” new battery passed its test first time, and only showed up the major fault on the 3rd test!
He said if it was his car, he wouldnt go investigating anything until the battery was replaced!
So I think I will just be pragmatic, and stop charging it, i.e. treat it just like a normal car, until it fails to start. And call Mobilo and get them to replace the battery.
I’d dropped it off before the weekend for them to do some work on Tuesday.
When they came to move it on Tuesday it showed an “ABS and ESP Unavilable, see owners handbook”. Warning in yellow.
By the time they had moved it , this disappeared.
I have seen that 3 times in the last month.
They had a quick look at it, and it had thrown a load of conflicting fault codes, wheel sensors , axles speed sensors, steering sensors , rear sam , door sam, all undervoltages , said it couldnt move out of Park when it could.
And it said one wheel sensor reported 201 mph and the other three 0 !
Some crazy donut!
Many of the undervoltages were 11.74 to 11.25V!
Note just before I dropped it off it had a long 36 hour slow charge by my CTEK.
As a courtesy unaware of the above slow charge, they gave it a trickle charge and were surprised to see it came to full charge in under 4 hours! They thought that might take 7 or 8 hours.
And when they checked, the current drain averaged only 20 mAs. Apparrently perfectly OK.
They cleared the codes and she started beautifully with no warnings, and out of interest at no charge they quickly looked at it on STAR ... no fault codes!
They say this is indicative of a defective battery that cant hold a charge.
Some of you may have seen I have been winging that this effing “replacement” battery seems to need a top up charge every 3 days if not driven.
I had also noticed that when it was say at 12.4V it usually took about 10 hours on the CTEK to fully charge, but a couple of times had done it remarkably quickly.
(and due to this nightmare, I had been checking the CTEK was charging properly Volts and Amps).
The fault codes they got were pretty much all the codes I got when the new battery was installed last year. These codes disappeared when they replaced it with this one!
Coincidence .. I am sceptical about coincidences! Strangely their manufacturing dates are withing a few weeks!
The technician said that officially I should book it in for a full battery test, and if it failed then there would be no charge and a free replacement battery!
I do recall the initial “defective” new battery passed its test first time, and only showed up the major fault on the 3rd test!
He said if it was his car, he wouldnt go investigating anything until the battery was replaced!
So I think I will just be pragmatic, and stop charging it, i.e. treat it just like a normal car, until it fails to start. And call Mobilo and get them to replace the battery.