I have a 87 190E and I'm trying to replace my switch on the dash for slecting the heater fan speed, Mine is broke and I took out the push button control pannel for the heater system which is located just under the switch I'm trying to replace. It is visible from underneith but I cant figre out how to replace it< i cant get it loose and I cant figure out how to loosen it, It shouldnt be that complicated? Can it?
any links that can be passed on or pixs would be greatly appreciated

Thanks in advance to any that can help me

David Lee Portland Or.
87 300D
87 190E 2.3
84 230E Euro