As the interior was in bits, one option this car was lacking was S677 HiFi system Professional DSP and while not being the last word in car audio, its a marked improvement over the woeful base sound system in an E39 and as I had a full set up left over from the last M5T builds donor car, it was always going to go in 003.
The DSP system is made up of a separate amplifier, additional tweeters in the rear doors, rear shelf mounted sub woofer, upgraded front and rear speakers plus equaliser control.
To retro fit the system the main audio sub wiring loom needs to be swapped, the front door looms swapped and the rear door looms swapped although oddly 003 rear door looms were pre wired for it, possibly due to it having the heated rear seat switch wiring so maybe one fully populated loom was made. The amp then needs bolting in with its brackets and the shelf mounted sub fitted in place.
While swapping the door looms, new membranes were fitted, a common E39 water ingress point and almost certainly had contributed to the corrosion it had suffered from.
003 has electric rear blind and door blinds as part of its original spec but when I bought the car, three out of four of the door binds were missing so another set were sourced and fitted.
The parcel shelf sub mounted and all boot trim back in place along with the M5 luggage net, lesser E39's had a pair of rubber straps. All of the boot trim was replaced with a better set from the same car which donated the DSP system as when I bought the car, the boot area was in a dire state more akin to the back of a
a builders van!
Those familiar with the changes made during the E39's production will know that a pre 2001 car would have had the smaller screen rather than the wide screen pictured above so 003 would have originally had a small screen monitor when new. When I bought 003 it had a wide screen along with the later round air bag steering wheel as well as grey dials to facelift it inside so as per a previous post, the dials were changed to the earlier black ones, the steering wheel back to the earlier type but i've kept the wide screen for a couple of reasons.
The earlier narrow screen monitors have a trim surround to match the rest of the cars interior trim, silver, wood etc and unfortunately I don't have a Bruyere wood trim for the monitor and also I couldn't do the touch screen apple car play upgrade to the narrow screen monitor.
The monitor along with the other parts were sent to Baris at
www.carphonics.co.uk for the upgrades to be carried out and along with the upgraded BM54 radio module and DSP retro fit, 003 now has a reasonable sound system with modern functionality of apple car play all being pretty much factory looking and operating.
The seats were in a bit of a state so Frank at
https://www.barkersrestorations.co.uk/ worked his magic and tidied them up.
The original black headlining in 003 wasn't in great shape with some sagging at the back, the sunroof liner split and hanging down and the A pillar trim cloth coming adrift so it was an ideal time to carry out another nice retro fit, S403 Glass roof electrical and alcantara head lining, a full set i managed to find on ebay for a reasonable price.
The end result is an interior which has gone from tired seats, mismatched trim, missing or broken parts, a crap audio system barely working later parts fitted to an earlier car and a general air of being rather down beat to a much nicer place to be!
All in time for a morning out in the car.....