Do these bolt directly to my M2 without drilling or brackets?

Yes. These mount at factory attachment points — no drilling or custom fabrication needed. Hand-torque the fasteners and you're done.

Are the daytime running lights always on, or can I turn them off?

DRL function depends on your truck's factory wiring and module setup. Most M2s run DRL whenever the engine is running; consult your owner's manual or a Freightliner technician to confirm behavior on your specific year.

What if one headlight arrives damaged or stops working?

Contact ModSupply customer service with your order number and photos. Return shipping and replacement terms are handled on a case-by-case basis — have your proof of purchase ready.