Owner's book · not a shop
Know the car. Then the window. Factory specs in plain English — don't authorize until you can say this at the counter.
RO glossary
Beginner · short stepsExpert · spec · code · mm
Look up the slang on the ticket. Read the trap on that line.
Invoice slang: LOF, MPI, R&R, NTF, shop supplies, 'while we're in there.'
Invoice slang
Try cabin-filter, LOF, or flush
trans
Gear oil in axles and the transfer case. Interval or leak, not every oil change.
Say · Which unit, which spec (GL-5, limited-slip additive), and did they find metal?
A '4x4 service package' without naming the units is a bundle.