Hi guys,
Hoping for some information.
1984 Mercedes w123 300d

I had to replace the ignition steering lock assemble as the keys would no longer turn in the ignition.

I removed the under dash plastic panels, removed the dash gauges noted down where what went, removed the ignition assembly, noted which vacuum tubes went where removed the key buzzer wires etc.
Got the new lock assembly swapped the ignition switch, and the buzzer switch and diesel switch and put everything back where it came from started up and everything I thought was fine.

But then I noticed the fuel gauge reads full, oil pressure is up at maximum and the temp gauge creeps up as you would expect but just keeps rising to max. (Removed radiator cap and could hold finger in water was warm but not hot) lol I know silly but I knew it was not hot by the lack of steam.

I know there is only 1/2 a tank of fuel,
Oil pressure gauge use to sit about halfway
Temp gauge again normal sits about 1/2 way up.
But as I said they are now all reading max.

Pulled the dash out again just in case there was a wire I forgot to reconnect but everything looks like it was correctly reconnected.

Hoping someone has an idea, I don’t have another instrument cluster or access to one to try

Thanks in advance.