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Originally Posted by HighlandPete
Why do you come to that conclusion? BMW have indicated the PTC is there for heating the diesel engine models, due to engine efficiency and therefore not fast enough cabin heating.
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I come to that conclusion because the real oem for the F10/11 clearly states "For vehicles with Autom. climate control with 4-zone ctrl" and even list the same parts for petrol version with 4 zone A/C. I'm would think those elements are just to trim air for the 4 possible different temps required which would make sense why they are included on the petrol cars too.
Quote:
Originally Posted by HighlandPete
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Both of those links point to PTC elements being on all cars with Automatic air conditioning and it looks like the system is the same on both the 1 and 3 series diesels. Its not the same as stating only on a car with 4 zone A/C.
Are you assuming they are on the diesel 5 series or have you seen anything to point towards that other than the links above?