I would expect that his plan is to contact the embassy and claim that his passport is lost or stolen. The embassy can then arrange for his wife for wire him money for a ticket home and a temporary or replacement passport. This is a pretty routine thing for an embassy to do, it’s a pain in the ass and often takes a week or two, which is pretty devastating if missing an extra week of work gets you fired but not nearly as bad as being killed by a drug lord. If he didn’t have a solid history in Germany and a reliable contact in who could front enough cash to sort things out it could be much more difficult, but I’m pretty sure his wife can come up with the $1000 or so that he needs. The foreign people with no papers who have a problem are the ones with no network back home to identify them and no one to wire them cash.
He doesn’t really need to evade the authorities, just Mike (and the rest of Gus’s organization). To the authorities he’s just a German citizen who lost his passport, which is routine. In the worst case, he was working as an illegal alien which just means the US will want to deport him, which still gets him back to Germany, just probably with a ‘no reentry to the US’ stamp. In the more likely case, he’s a guy with some kind of long term work or tourist visa through Madrigal and wants to go home, in which case it’s really no big deal. As far as we’ve seen he’s not actually wanted for anything.
The riskiest thing IMO, and the part he probably hasn’t thought about, is that during the annoying week or so to get things sorted out, INS will probably detain and hold him since there’s no actual German embassy in ABQ. This would just be an inconvenience if there wasn’t a drug cartel looking for him, but while he’s sitting in a holding cell with a bunch of Spanish speaking people who also don’t have valid papers, he’s extremely vulnerable. I could certainly see him getting to the airport, calling the embassy, and arranging everything to be home in a week, then ending up dead or removed because Gus sent a guy or got Lalo to send a guy to kill him. It’s certainly not hard for a cartel to get someone into an INS detention center, they actually spend a lot of effort avoiding that!
That could be the ‘loose end’ that Lalo helps with in the summary. Gus getting Lalo to do a favor would work well for him - it would maintain the fiction of Gus being a wimpy distribution genius and not very capable of fighting or pulling off violent plans on his own, and play into Lalo’s ‘burying the hatchet’ idea to help keep the Salamancas off guard.
Yeah, but so is using something stronger than a padlock on the roof access. They may have felt that holding documents and cash was too likely to spook the engineers even with the big payout promised at the end and not actually done that precaution. Also, while Werner may not have been this paranoid at the beginning, it’s not unreasonable for him to hide some cash and documents in his luggage, like sewing an envelope into the lining somewhere. I certainly would if I was going into a shady situation like that, and we know he’s not flat broke to start off with.