Merc SL R231 Sub Frame Corrosion - Merc Contribution

[96spec76]

Trying to get some advice - long term SL R231 owner - well my wifes SL. 2012 car with ~41k on - Full MBSH and purchased used from MB - has been serviced annual at MB Harrogate. The car has just failed its MOT on the subframe - no previous advisories or notes on the subframe until now.

Rear Sub-frame corroded to the extent that the rigidity of the assembly is significantly reduced (6.1.1 (c) (i))

Merc are offering 50% on the parts and labour. Reading around - Merc US increased the warranty on this part due to the issues on this and some other models from the same period - and due to a class action lawsuit.

There are UK owners where Merc have covered 100% of the cost. Any thoughts - do I just accept the 50% gratefully or should I be pushing for more?

[Gixer968CS]

What is the total cost?

[96spec76]

They suggested ~3k

[Robertb]

I'd push for it to be 100% covered... as you say, they've been doing the same for others. As you've always had it looked after by MB dealers you've a strong case.

Odd its gone from not noted to fail over one year. Same MOT place?

[BEARDYB0Y]

Id widen your search as well, a lot of similarly aged C class and E class have those same issues appearing with their rear sub frames.

The logical part of my brain says that if they are willing to do 100% cost on those cars (and I saw this when I worked for MB), then why not on your car... then again, thats logical thinking and warranty departments are frequently dont think that way...

[SteBrown91]

It should be covered under the anti perforation warranty.

[GlenMH]

My 2011 E class rear subframe was 100% covered.

[Terzo123]

I appreciate the below is for North American cars, but as far as I knew, UK dealers were doing similar.