I don't know what we charge for plugs on 112 and 113 motors but twice the plugs means twice the time. I would suggest you do it yourself and see how long it takes.

Of course if you ruin 1 plug connector in 3 the cost of labor won't be your problem.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician