Below are a few examples of how the words can be improved. The original idea is still there, but the English is now much easier to read.
Original
In case the multifarious options and accessories should not meet the needs, our engineering and manufacturing staff works on an individual solution for the customers.
Corrected
In case our many options and accessories do not meet your needs, our engineering and manufacturing staff can create a tailor made solution to fit your exact requirements.
Original
Here begins a different world! Please let us have your personal thoughts or experiences about it and send us your email
Corrected
A new world starts here! Please send us an email telling us about your experiences or any thoughts you have about our products.