loss of power

[mobeyone]

You should use additives every few months, I think even mercedes have an additive that they use periodically.

Is this for all MBs? new and old?

 

[janner]

does anyone know what temperature these cars should idle around once warmed up

Depends on the thermostat fitted. Normally 87o.

Has your car ever had the fuel filter changed?

 

[Dieselman]

Is this for all MBs? new and old?

Every vehicle on the road will gradually suffer with gummed injectors.

 

[mobeyone]

Every vehicle on the road will gradually suffer with gummed injectors.

what would you recommend for a w203 c320 petrol?