replace the thermostat for a start...
Yep, for a whole 30 euros you can buy a thermostat. A good investment in a diesel where you do want to run at a decent temperature.
Funnily enough I've got the same problem in my 190D 2.5 turbo at the moment. Coming down from a skiing village a couple of weeks ago, it strangely wouldn't get above 50 degrees C. Sitting at lights it's going up to 100! Maybe these thermostats only have a lifespan of 16 years to the day?[
] (mine's an '87 too)
Yep, for a whole 30 euros you can buy a thermostat. A good investment in a diesel where you do want to run at a decent temperature.
Funnily enough I've got the same problem in my 190D 2.5 turbo at the moment. Coming down from a skiing village a couple of weeks ago, it strangely wouldn't get above 50 degrees C. Sitting at lights it's going up to 100! Maybe these thermostats only have a lifespan of 16 years to the day?[