W221 - No use for 5 weeks

[camerafodder]

I think that there is some serious over-thinking going on here.

 

[mbenz1]

You can leave the electronic brake off. Well, you can in an Audi or Jaguar. If you leave the handbrake on for a long period, the brakes will stick. Makes a horrible noise when they release.
When you select 'Park', a pin engages, in the gearbox I think. The car won't roll away.

Then most-likely it can be done in MB... I will try this on a flat surface sometime soon... If the car alarm does lock the car without the handbrake on then I will put a brick behind both rear wheels to ensure it will remain 100% still

Re the max pressures - those indicated in the fuel flap are the recommended pressures for different operating conditions , the highest ones being for fully laden with luggage & passengers and for a long run - these should be fine for this purpose . Depending on your car and tyre combo , I'd guess you could be looking at high 30's front to low/mid 40's rear . You can drive the short distance back from the filling station with this but prolonged use might see uneven tyre wear ( wear in the centre of the tread width ) .

The maximum permissible inflation pressures are normally printed on the sidewall of the tyre - this is higher than you'd ever want to run the car at , but is good for longer term storage , say several months . This could be pressures as high as 50 or 60 psi and will prevent flat spots during longer storage , but you would not want to drive more than a short distance , exercising caution , like this as the handling could be compromised . Inflation to these pressures is best done at home , unless there is a petrol station very close by .

Ahh, got it. The maximum permissible tyre pressure for both front and reae is 51 PSI - just had a look now. Luckily the petrol station is roughly a 1 minute drive so I will fill the tyre pressure slightly above the normal pressures - 35 and 38 PSI sound okay? - 33 PSI for front and 36 PSI for rear is the stated pressure on the fuel flap.

As mentioned above, the Airmatic might sink down after not being used for a few weeks but it shouldn't give you any problems.

Same happens in my Audi - over time the car's systems will gradually shut down one by one if not used and after 10 days or so the air suspension sinks right down over the arches, almost to the floor. So I imagine it will be similar in the W221.

I'd leave the parking brake off if the ground is flat. Or just chock the wheels if on a slight slope.

If it was me then I'd take no measures and just leave it how it is and not worry

Ok, so if after returning, the car is fully sinked down, there is no need to worry...since it's just the airmatic resting. That's definitely good to know.

I think that there is some serious over-thinking going on here.

I think you are correct. My main concern is the Airmatic and the battery tbh. But there is no harm in learning about any other general preventative measures that can be taken