Yes any split or cracks in the hoses can cause idle deviation. I do recommend that you replace all of the related hoses when dealing with any air related system. If you need the parts, we sell them!

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