aka$h
MB Enthusiast
Bought a APS50 on ebay and spend an hour fitting it today.
I took photo's along the way to help with the guide.
My car is a 2003 which already had a audio gateway.
Before:
Remove the trim around the gear selector first, by pulling the front of it upward. Once the up move forward and lift up completely.
You will need to twist the bottom of the gear selector to release and then pull off, dont forget to disconnect the wire for the W\S switch.
Next remove the ashtray, just pull the bottom upwards and you should be able to remove it, it helps if its open too. Remove the cigar lighter connector too.
Behine you should find 3 wires going into the bottom of the cd changer, disconnect all 3, be very careful not to bend of damage the fibre optic lead.
These 3 leads
At the back, under the cd changer you will see 2 torx screws, remove them.
The changer unit should now slide out, remove it and you will find 2 torx screws under your headunit, you have to turn these a lot more than you think so dont be alarmed if it the unit doesnt budge, just keep undoing the screws.
You can then pull the unit out, you will then find a connector at the back of the unit.
The installation of the gps unit Ive not documented as I cheated and installed a normal unit at the top left of the dash, just ran the cable under the glovebox and up the side.
Here is a photo of the completed job:
Drop me a pm if you need anymore info.
I took photo's along the way to help with the guide.
My car is a 2003 which already had a audio gateway.
Before:

Remove the trim around the gear selector first, by pulling the front of it upward. Once the up move forward and lift up completely.

You will need to twist the bottom of the gear selector to release and then pull off, dont forget to disconnect the wire for the W\S switch.

Next remove the ashtray, just pull the bottom upwards and you should be able to remove it, it helps if its open too. Remove the cigar lighter connector too.

Behine you should find 3 wires going into the bottom of the cd changer, disconnect all 3, be very careful not to bend of damage the fibre optic lead.

These 3 leads

At the back, under the cd changer you will see 2 torx screws, remove them.

The changer unit should now slide out, remove it and you will find 2 torx screws under your headunit, you have to turn these a lot more than you think so dont be alarmed if it the unit doesnt budge, just keep undoing the screws.

You can then pull the unit out, you will then find a connector at the back of the unit.

The installation of the gps unit Ive not documented as I cheated and installed a normal unit at the top left of the dash, just ran the cable under the glovebox and up the side.
Here is a photo of the completed job:

Drop me a pm if you need anymore info.