I ordered my grill for my E320T from Precision Auto Designs, it lists on the catalog for US$299.00 plus $16.00 shipping. It is called the "600 look grill" (same design as the Avantgarde grill).
They can be contacted at
www.precisionauto.com or 800-222-7253
Also try to get a quote from the PartsShop, they might be cheaper and they provide an excellent service.
A. Rosich
S320, 1998
E320T, 1995