i had the same problem with my w202
i had to get a comlete cluster from the scrapy and put my clocks in!
my perspex was glued in
i did atemp to take it out and only made it worse!
What I did was to get a similar, complete cluster from a scrap yard, £20, and swap over the front halve, this is a W202 below, yours may be much the same set up.