Many w126s with MB Tex have the same crack on the driver's seat left bolster. On my 300SD, I had a local shop to replace just that one section. The shop matched the material very well and I could hardly tell the different. The job was $200 which included two new springs, non-MB padding, repairing MB-Tex bottom cushion, and replacing the left bolster.
[This message has been edited by be459 (edited 11-07-2000).]