Member, P500 Sport, DSC off (>900)
Join Date: Oct 2009
Location: New Zealand
Thanked 179 Times in 139 Posts
Seasons Greetings David!
I've learned a bit about these pillar covers from having my own set done, so I'll try and offer the best advice I can, based on this.
If the C-pillar cover is the original, the material should come off easily, as the foam backing will most likely be knackered.
Be sure to clean off all foam and adhesive residue from the fabric and the cover, then launder the fabric (cold wash, delicate cycle with a mild detergent, dry in the shade).
Actually I'd recommend doing both covers, in order to have them looking the same.
Get a plastic welder to repair any broken tab(s) and extend them slightly so they engage properly upon installation.
A new cover will give you the same short-tab issue I had, possibly leading to more broken tabs, and will probably cost you more than the weld repair on the old ones.
You can either fix new closed cell foam (1/16 inch recommended) to your fabric sections, or opt to re-trim both pillar covers with just the (laundered) fabric and no foam backing - depends on the look you want.
Also, depending on the colour and type of fabric you have and the weave, etc, adhesive bleed-thru is a concern here. Fortunately this was not evident at all with the tightly-woven backing on my CSi's charcoal-coloured velour fabric.
Use a good quality spray adhesive - ask a reputable trim shop what they recommend.
In fact, if you want a first class result, just give the trim shop the entire job!
Hope this helps.
1987 E28 M5 (DC98) Delphin-metallic/Midsilver Nappa
1986 E23 745i/M88 (6928) Arctic-metallic/Oyster Nappa