[AlanD]

Hi again RXJ,

Seems to be either an intermittent fault that might be system voltage dependent or a location problem that is only there at certain times of day.

You do not comment as to whether the GPS is active when you begin using the car in the morning and then drops out at some point along your route, but doesn't do the same on your return trip later in the day.

So I'll ask some questions:

1. In the morning is the GPS inactive from the time of engine start?
2. At what time in the morning do you leave for work?
3. At what time in the afternoon do you leave for home?
4. On the day that the GPS did work in the morning, did the car get used in the evening and if it did was it a long(ish) trip? Arriving at home at what time?
5. What time of day do you leave for work?
6. Are we talking about the MC? MDs have been on the market since 2015 (I think) so your battery will now be getting on for 4 or more years of age unless it has been replaced. Am I correct in this assumption?
7. Is the car garaged at home inside or out in the weather?

You might get a feel for where I am going with these questions.

Cheers