ML270 Bottom Pulley Key Sheared

[IMB]

Has anyone else experienced problems with the bottom pulley on an ML270. I have an X plated ML270 with just over 60,000 miles on the clock, the bonding on the bottom pulley failed 10 months ago and was replaced by a large chain servicing centre with a 12,000 miles, 12 month warranty. Unfortunately the bottom pulley has failed again but this time the key appears to have sheared and damaged the crankshaft. I have a few questions, firstly is this a common problem and secondly if this is not a known problem for the ML270 do I have reasonable grounds to persue a claim against the repairer, as I'm led to believe this is going to be a very expensive repair. The repairers are currently denying all liability for the damage caused, as I'm not an automotive engineer I feel that I am being fobbed off, I find it hard to believe the bottom pulley could come loose if it was torqued correctly.

Can anyone offer any help or advice please?

Regards

Ian :-(

 

[television]

Hello and welcome with your not such good news.

If torqued correctly there is no way that this can come lose, its the first time that I have heard of this. So I take it that the key way in the crankshaft is damaged.

The correct torque is high. the first stage is 325Nm then second stage angle to + 90 degrees

You must be able to claim, maybe a letter from MB

 

[IMB]

Thanks - who do I contact at Mercedes for advice

Hi Malcolm, yes the keyway in the crankshaft appears to be damaged, the repair centre initially said the crankshaft wasn't damaged and that as a gesture of goodwill they would replace the pulley. When they eventually tried to repair the car having had it for 8 days they found that they couldn't and are now not acccepting any liability for the repair.

I have tried to have a look around the Mercedes Benz website for the appropriate contact detail, does anyone have the correct details for MB for me to write too.

Regards

Ian

 

[kth286]

If you are a member of the AA or RAC they will assist you because they have a technical investigation dept for such disputes. Otherwise employ your own technical investigator - they are around.

 

[television]

This cannot fail through any other reason than to have been incorrectly torqued

 

[BlackC55]

I have never know one to fail. EVER

 

[television]

I have never know one to fail. EVER

Thank you for joining this, at least you work on them

 

[BlackC55]

Where do you live?

 

[IMB]

Thanks to everyone who has responded

I would just like to thank everyone who has responded, as a result of the postings I have gone back to the repairer who has agreed to pay for an independent assessor of my choice and if he concludes that the failure is as a result of the centre bolt not being torqued correctly they will pay for the repairs in full.

Many thanks, fingers crossed the assessor will agree.

Regards

Ian

P.S I live in Northants

 

[television]

A success to a point, who is going to fit the crankshaft

 

[IMB]

That hasn't been agreed yet, I presume you would recommend that it is done via a MB main dealer, the repairer has confirmed that it is not work that they would carry out and quite frankly I wouldn't let them near the car again.