300SL CONSUMPTION GAUGE

[BF]

The Fuel Consumption Gauge on my W107 300SL has stopped working and is constantly on the maximum level.

What could the problem be?

 

[MotardMan]

Is the throttle stuck open?

Seriously though, I think it works via vacuum from the inlet manifold, it may be worth checking the hose that feeds the vacuum to the guage?

Best,

Jim

 

[Malcolm Brown]

Previous reply is correct - but the answer could be slightly more complicated. I've not had this problem on my SL, but did on the SE which works on the same principle. The solution was a perished vacuum pipe on the headlamp height adjustsr switch (also vacuum operated). It all depends on how the pipes are routed.