I have a C180 1995. When it gets very humid or very hot the indicators usually stop working! MOST of the time, in normal temperatures and dry weather they are OK. I've also noticed that sometimes the fuel gauge does not show the correct value (like nearly empty after a fill?) - again in humid weather; however if I stop, switch off then switch on the ignition and wait a couple of seconds THEN restart, it seems OK. I believe I have noticed one or two other gauges acting up occasionally. It's gradually getting worse I think. I've been told it's most likely RELAYS, but needs an auto electrician with a few hours (@ $$$$/hour..) Can anyone give me specifics about these problems, maybe pics, a web site, or which relays might be affected? How many relays are there anyway??