Hah. The Mercedes and Volkswagen factories in Russia basically just did final assembly. Things like engines, well most components, were all imported. So if you are interested in having an empty building with an assembly line for final assembly and little else, plus a lot of willing workers, you can have it. Did you expect something like that to be bought for much? The whole place is a huge liability. The state will probably have to pay unemployment benefits for these people for months. Just not right now because they have their severance package. Russia is not like those "at will" states in the US. At least not since the wild 1990s.
The Renault plant, or should I say Lada plant at Togliatti, it is different. But still pretty hairy. Renault was switching Lada from using a Russian designed car platform, to their own common platform. So guess what, lots of imported electronics (even things like windshield wiper sensors), airbags, transmissions, etc. Sure the chassis, paint, and engine is Russian. But little else. The transmission was supposedly assembled in Russia but used imported parts. Even the steering wheel was imported. So, Lada basically switched production to the car they were producing before acquisition by Renault, should be rolling off the assembly lines next month. The Renault plant at Moscow was just another assembly line for imported Renault group crap.
The only car factories which had no shutdowns were the Chinese ones. Great Wall i.e. Haval and Chery. The South Korean car factories had a short stoppage, but then decided to continue. Hyundai group already had decent enough production cycle where engine assembly was done in Russia. Great Wall is also expected to start assembling engines in Russia this year.
The Russian state gave car manufacturers tax benefits on a sliding scale the more Russian content the factories put in the cars. But a lot of them were not using that much native content yet. And modern vehicle electronics in general are a bugbear basically.
In the long run Lada will either find new partners or make their own vehicle platform. But making a new vehicle platform takes quite some time. Years. They got the guys who made the Aurus car, NAMI, working on it. But I think at least some of the other plants will be closed and some might be sold to other car manufacturers. Who knows, maybe Indian or Chinese ones. A lot of people in the government are getting kind of chaffed at foreign car manufacturers in general though.