It should be free to have the disc inspected. If it is faulty it is not an expensive repair. Sorry though I don't know the cost of the part. As for the stalling, I would have the fuel pump relay checked out soon.

------------------
Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
LEAD TECHNICIAN FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM