It's one of those things we take for granted living in the States. In Germany, it's pretty much illegal to do most involved DYI auto repair procedures where your activities can be seen by the public. Especially things like engine removals where you might accidentally spill ANY engine related fluid onto your driveway. Spilling such chemicals will get you a hefty fine.

I will bet you those restrictions have a big impact on Olli's plans. Unless he has a large garage (rare - most are barely bigger than the car) or acreage away from prying eyes (also rare).