V Class Central Locking Blown

The central locking on my sister in law's adapted Merc V Class has blown.
Apparently all solenoids and Control Unit. Anyone any knowlege as to whether
it is possible to check control unit?
Thanks David
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.