If its not intentionally misleading, you lack some very basic understanding on how economies work.
Sigh.
As others have deconstructed this laughable post already, I will just add something to this sentence:
"As most of Germany's exports are high quality / high value hard products, not services, then I wonder how may other EU countries can afford to buy all those expensive ( and desirable ) cars and machine tools to make up for the reduced sales to the UK ?"
Do you think before you write something?
You just said it yourself, those are high quality products. Who will buy them if you leave without a deal? You. Just that it becomes more expensive.
The biggest strenght of the German economy and trade is that most of the goods are irreplacable.
You really think someone will buy a Jag instead?

They won't. You know why? In Jaguar's bracket, the biggest sales driver are company cars. Those companies are looking for resale value. The resale value of German cars is higher. They will continue to buy how they buy.
There is very little the UK can't manifacture themselves? True. Thing is, the UK doesn't produce anything anymore. You have decidied to have a service/baking economy. Especially the latter is very vulnerable to new EU regulations, while it is, in reality, impossible to just stomp whole industries out of the ground. Most of the knowlegde needed for those industries is long lost in the UK and won't ever come back.
You really have lost your sense for reality. Or, you really don't know better.
Probably the latter.
See guys, this is how we ended up with Brexit.