03 clk320 analog speed cluster

this car analog speed reading will not go above 60 kmph even though you are going faster. any thoughts. shop has suggested replacing custer. vehicle hit a rock on the road damaging the right road wheel,
otherwise everything fine. any thoughts would be appreciated
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

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.