Many quick lube places do that to the people around us too. They use a 1/2 in wrench that is a 12 pt style instead of the 13mm 6pt style needed. I have taken out no less than 20 in the last 2 years.

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