Hi Alexander,
I did a quick check on several of the pages you showed on your post. Yikes! many of these are indeed broken.
404's are a big concern with user experience, when a user experience is disrupted, it reflects poorly on the website and the brand. 404 errors are the result of the following:
- A website redesign
- For ecommerce is common to see these errors if product pages that have been altered, removed, or the product was discontinued – which means the URL was altered or the page was deleted.
- Spelling errors within the page source of the link – whether internal or external
Before you decide to get these pages out of the search engines, find out if you can fix them (i.e. a spelling error).
Here are some detailed instructions to tackle the problem:
- Go back to GWT crawl section where you found the broken pages.
- Click on the Not found tab
- You will see a graph with the current 404 error pages
- You will also see the broken URL's at the bottom of the page
Download the file as a .csv or click each specific URL to see more information.
- GTW will provide you with a window with "error details" and a “Linked from” tab.
- Click the Link from tab.
- GTW will show you the linking source to the particular 404.
_ Side Note: Another great way to find the linking source of your 404 pages is by running the Xenu program (free tool!)_
Once you find out the linking source of the 404 error then determine if the issue is caused by a misspell, or if the service/product is no longer available.
- If the error is an internal misspell, then correct it at the source level, easy!

- If the error is an external misspell or the product was deleted/moved, then politely reach out to the external site and request that they update their link appropriately to a working page.
If the service/product is no longer available then you have a few options to take care of the 404 problem.
1) 301 redirect the pages to the next best source that will be useful to your users. Maybe is the category page of the product that no longer exists. NOTE: always use 301 redirect, keep away from temporary redirects 302's. Your website runs on an Apache server so you will need to update your .htaccess file. Here is a great resource to help you get started (http://goo.gl/LCKZ7N)
2) You can also use your robots meta directives to tell the bots to discontinue any future indexing (noindex), remove the current pages from the database cache (noarchive) AND prevent Google from showing a snippet (description) under your Google listing (nosnippet)
3) Request Removal: Once you update your link sources and Google re-crawls your site it will likely notice that the page has been updated/redirected, and the 404 will disappear. However, if it is a high priority or if the error remains lingering, you may submit a URL removal request in Webmaster Tools.
Kevin provided great advice regarding the robots.txt pertaining search pages. Indexing these parameters create duplicate content problems.
Once you feel the issues have been resolved, go back to your GWT select the links that have been resolved and “Mark them as Fixed”. Marking as fixed will suggest to Google that the link is no longer broken and will virtually send a request to re-crawl the page.
Continue checking your GTW tool on a periodic basis to ensure these crawling errors have been resolved and to take care of any new ones.
Hope this information is helpful, cheers!
~by