Automatic jerking

[ernieh]

Blue Efficiency Software

Thanks for your reply. Before yesterday I was always driving it in C mode and it always drives off on second gear. Strange yours doesn't...
.

After having thought about my last post for a bit, there are two points that might account for the differences between our cars and which I overlooked: One is that my present car is a diesel, yours is petrol. I think that any previous discussions on this forum related to diesel cars. (like yours my last car was also petrol and as I said, it started in 2nd when in C mode)

The second is that yours is a Blue Efficiency and the set-up will be almost certainly different from mine which is pre-BE.

I might also say that mine can lurch slightly on the change from 3rd to second when, say, exiting a roundabout, especially if the ECU thinks that 3rd will be OK, and I give it a bit more welly than it expected and makes a late change to second. I put it down to driving technique rather than a software glitch, but maybe as the warranty runs out next year, I should get it checked....

Maybe somebody with a BE petrol could comment, because I don't think comparing petrol and diesel behaviours is ideal.

Sorry if I confused things a bit....


Ernie

 

[ferasalhafar]

Thats why yours starts off on second gear in C mode. Hopefully after tomorrow I will have some answers!

 

[ferasalhafar]

They couldn't sort it out on friday, they filed a case and sent it to the head office and then they will decide what to do next.
If they can't get the C mode working again, will changing the ECU fix the problem?
How difficult is it to get MB to change big parts?

 

[ernieh]

MB Changing Parts?

It shouldn't matter....the point is that they need to fix it regardless of the parts required!

Ernie

 

[ferasalhafar]

I hope so!

 

[Steve Lowe]

I seem to have a similar problem on a 2001 W203 although my jerking happens as I pull away, I think between first and second gear. It's my first automatic and am seriously regretting it as if it's a gearbox/TC problem I know it will be expensive

 

[ferasalhafar]

I seem to have a similar problem on a 2001 W203 although my jerking happens as I pull away, I think between first and second gear. It's my first automatic and am seriously regretting it as if it's a gearbox/TC problem I know it will be expensive

I don't think it is expensive to update the software, it fixed the jerking in mine but I don't have a C mode any more! well, untill I hear from the HO.

 

[ferasalhafar]

ECU replacement!

They installed another software but I still have the same problem, the C/S button doesn't work and the car always drives off in first gear.

So they filed another case again and sent it to the HO before Xmas, today the dealer rang me to say that they will change the ECU and they are waiting for the factory in Germany to send it to them.

I knew from the begining it is to do with the ECU. What strange is, the car is only 17 month old and the ECU needs to be changed !! Does anyone know what causes the ECU to fail?

And does anyone know how much do they cost? (I hope that I won't need to change it after a few years)

Thanks