Guck mal ob es so geht:
Text:
{% if page.product.translated.customFields.custom_product_description_grid_text1 %}
{{custom_product_description_grid_text1|raw}}
{% endif %}
Bild:
{% if page.product.translated.customFields.custom_product_description_grid_picture1 %}
{% set mommeMediaId = page.product.translated.customFields.custom_product_description_grid_picture1 %}
{% set mediaCollection = searchMedia([mommeMediaId], context.context) %}
{% set mommeMedia = mediaCollection.get(mommeMediaId) %}
<img src="{{mommeMedia.url}}">
{% endif %}