in swedish, but a picture of how i measured the wiring was done on the contact that fits in the back of the cluster on a w123.
might make an english version later on.
Mercedes-Benz turbo
Mercedes-Benz cars, mint condition and/or extreme boost
Request for colour code of wires to the cluster instrument round connector (femalr). I mistakenly opened it up. Now need to put them back in proper sequence. 1983 Benz w123 300D