Mercedes used to always have a residual heat function where the coolant could keep being pumped through the heater matrix when the car was off.
This meant you could run the heating in the car for a long time with the engine off, great when waiting for someone (like the kids).
They they then seemed to only include the function if you had the advanced air-conditioning system.
BUT, sadly you can't order that on the new GLC in the UK, (and I assume the C class).
Luckily, I worked out it can be retrofitted relatively easily to even those with basic air-conditioning - if the car is new enough and is diesel as them some of the parts are there. (If its not diesel, it can still be done, but a significant job)
So, now I have residual heat function, and 'REST' written on one of the buttons on my air-con switches.
I'm quite pleased with that as I hate leaving engines running polluting the area where I'm waiting for the kids !!!!
Richard
This meant you could run the heating in the car for a long time with the engine off, great when waiting for someone (like the kids).
They they then seemed to only include the function if you had the advanced air-conditioning system.
BUT, sadly you can't order that on the new GLC in the UK, (and I assume the C class).
Luckily, I worked out it can be retrofitted relatively easily to even those with basic air-conditioning - if the car is new enough and is diesel as them some of the parts are there. (If its not diesel, it can still be done, but a significant job)
So, now I have residual heat function, and 'REST' written on one of the buttons on my air-con switches.
I'm quite pleased with that as I hate leaving engines running polluting the area where I'm waiting for the kids !!!!
Richard