I think people here are slightly overestimating the withdrawing Afrika Korps' navigation difficulties. They aren't trying to cross hundreds of miles of desert and arrive at a particular dot on the map. "Disengage to the south, drive 20-ish kilometres (that's 2 hours at 10km/h) roughly southwest then turn northwest and keep going until you hit Wadi Harawah or the coast road" are directions that barely need a compass to follow, let alone an accurate map (it's dark, the Pole Star will tell you if you're going SW or NW). The big issue is that any vehicle that breaks down or hits unexpected soft/rough ground is unlikely to get help.
The bigger issue is that only mechanised/motorised forces (and any PBI that manage to hitch a lift) are able to do it. No unit is going to march 50km in a night and anyone that tries is going to be stuck in the desert, with few supplies and no support, when the sun comes up and British motorised forces start their pursuit down the coast road. So dismounted tankers, artillery crews that have lost their tows and any foot infantry are going to be left behind to surrender the next morning. What makes it to Wadi Harawah is going to be a straggle of disorganised remnants, pretty much useless for any sort of combat until they get back to Sirte and Rommel can see about improvising a kampfgruppe.
I doubt the British will be able to pursue effectively in the night. It's dark, their armoured units (especially) have had a long march followed by a hard fight and everyone is exhausted, disorganised and short of fuel and ammo. Charging blindly West in the dark is a recipe for breakdowns, friendly fire and units getting lost. I'd expect a strong armoured reconnaissance force (11th Hussars plus maybe some "fresh" units from 22nd Armoured) to be sent West down the coast road in the morning while the main force tries to sort itself out.