Re: Blistering Paintwork Front Roof Pannel
Much as I am disgusted by this issue, in the spirit of fairness I have seen it with another car and I think that I can learn from this so share my thoughts.
In my opinion the early to mid 1990s Mercs are literally the best built cars ever. I have a 94 SL 500 which has a soft top and aluminium removable hard top. All these hard tops corrode in exactly the same place as the Cali, namely where the rubber seal meets the roof at the front corners and at the rear corners where the roof is near the boot. The rear corners do not press against a seal, but some careless people will stand the roof on these rear corners whilst moving it about.
The big difference of course is that with the Merc it took many years to reveal itself - and to be fair to Mercedes, the car was first sold in 1989 when Aluminium was not widely used in mainstream car bodywork. With the Cali, it is less than one year. With the Merc you only tend to fit the hard top once a year as opposed to the Cali where a roof may hit the seal dozens of times a year.
It is not easy to paint aluminium, and i presume that the Cali roof is made of this. also modern paint is water based and does not set as well as older solvent based paint. Logically I think that this means all Cali owners should consider applying the clear plastic film or other similar protection to the metal roof where it touches the seal, as what we are seeing now will just be the tip of the iceberg. A few companies do this film which is applied to stone chip hotspots on many higher end cars like wing mirrors, wheel arches etc.
I will do so in the very near future, so any recommendations of a good protection film fitter would be appreciated. I may be naive here, but this should be a recall matter where vw foot the bill. As a community is it worth the club lobbying vw to do this as the issue with the Merc SL is extremely well known (just look at any car you see, if it has not been resprayed it will have corrosion in all 4 Corners), so it is obvious to me what will happen to every single Cali that is made.