Hi guys!

Let me introduce myself to you, my name is Rolf, owner of Mömus - #stuffforcarguys, a small shop in the heart of Luxembourg. We sell performance, premium and classic cars, as well as performance and upgrade parts.

To promote all this goodness, we are rescuing and building up this here ugly duckling: an Audi A6 C5 2.7 Biturbo. It has 330000 km, tons of vibrations, rear accident damage, and is in a general of disrepair. It is also in a very poor spec, with the sports steering wheel as the only noteworthy optional extra. At least the air con works a treat.

The plan for this is to upgrade its performance to be equal to an all time dream car of mine, the Audi C5 RS6. However, did I mention our Ugly Duckling is a 6 speed manual? A big benefit over the RS6 in my eyes. I want to keep the exterior and overall condition the same for as long as possible, and have it be a real sleeper.

Mömus Audi A6 Ugly Duckling Before

Take a tour of our new project car in this little video that we made:

How to prepare your BMW for winter!

In this episode of 'Project Builds' presented by Mömus, we take a look at all the steps necessary to prepare your BMW for the winter months. From a humble wash, to a full paint sealant, window sealant in the style of RAIN-X, headlight bulbs, wipers, engine oil, fan / serpentine belt & tensioner and even the thermostat!

BMW E39 Android Navigation Update: Added Goodies & Gadgets!


Like i've said many times before, the head unit was about the best update we made to this car. Maybe I'm a media junky, but having any music / video I want on the go transformed the driving experience of our e39. 

But there are a few things that bother me about the install, and the issues are all down to myself. At the time, I did not consider the back-up camera that came with the unit to be any use, other that being a bit of a gadget. However, the screen blacks out any time the reverse gear is selected, and the music / video is paused. A bit of nuisance to say the least. Especially because it draws my eyes to the head unit, and there is nothing there. It feels unfinished.

MÖmus BMW E39 Android Navigation Install Back Up Camera Mugshot.jpg

And so, I decided it had to go in. The wiring was a bit of a headache to figure out, especially since I did not want to cut or slice the BMW's wiring harness. Eventually I gave up, and wired it into to the reverse lights, as per the cameras manual. I tried a few other solutions, but the thing just draws to much current. At the front, it luckily is a plug and play solution straight in to the head unit. 

MÖmus BMW E39 Android Navigation Install Back Up Camera.jpg

With everything apart, I figured it would be the best time to install another gadget that I had ordered earlier. An I-bus USB key to finally regain control of the board computer functions. I-bus is the system that runs all entertainment in this generation of BMW's, such as the radio / navigation, phone, PDC, etc, and this little USB key would be wired into that, with the USB end slotting into the Android unit. 

MÖmus BMW E39 Android Navigation Install I-BUS SUB.jpg

With an App especially developed for this USB key, the board computer functions would be available again. However, after wiring it in (tapping into the I-BUS wires on the head unit), the car started to develop all kinds of faults. First remote for the central locking stopped working, then the instrument cluster went down: indicator lights no longer worked, and neither did the blinker sound, nor did the blue light for the brights. Shortly after, the reverse lights were flickering.

MÖmus BMW E39 Android Navigation Install Board Computer App.jpg

Clearly, the Light Control Module was upset. And for good reason, the app also lets you fiddle with some setting of the car. I was really exited about this, as most settings were exactly what I was missing in the e39, such as a comfort blinker (auto 3x), coming home and leaving home, and locking the door when driving off. The LCM must have registered the foreign influences and shut down. Only after unhooking the battery, and de-activating the app, things went back to normal.

I contacted the company I bought the app from, to hear what went wrong. I then got a response that it must be because of my car being an "early touring" (1997 sedan), that the problem was known, and they don't really care. Nice.

In the end, I'm glad I installed the camera, it is a nice feature and adds a little safety. But I couldn't recommend the I-bus key with this app. It doesn't work.

We made this tasty little video of the install process:

Chapter two: The interior of our E39! Intro & Clean


It's finally time to start on the interior of our beast! But before we commence with any of the mods, a thorough cleaning is in order. Now, the previous (and first) owner of our e39, specced the car particularly well, with electrically adjustable, heated Aubergine leather sport seats, sport steering wheel, sunroof, and rear sun-blind. It is truly a joy to be inside the cabin.

However, as with many cars that are acquired second hand, the interior is covered in a thick layer of years and years of use. Especially the steering wheel is a real eyesore, and looks very greasy, grimy and slimy. It also appears to have some harsh skin oils induced damage.

Mömus bmw e39 aubergine leather interior sport seats M steering wheel before 2
Mömus bmw e39 aubergine leather interior sport seats M steering wheel Before

In my experience, the most (cost) effective way of cleaning leather surfaces like these are with a magic sponge, a very dense, soft foam sponge that only requires lukewarm water. No soap is needed, unless actual oil has to been cleaned of the surface. Softly wipe it (not rub) over the leather, and dry it off with a microfibre towel. The transformation is unreal!

Mömus bmw e39 aubergine leather interior sport seats M steering wheel after
Mömus bmw e39 aubergine leather interior sport seats M steering wheel after 2
Mömus bmw e39 aubergine leather interior sport seats M steering wheel after 3

Especially the colored stitching is popping again.

Gone is the shiny, nasty grime. The leather once again has factory like, matte finish and looks and feels soft to the touch. Of course, the damages have not been repaired using this method. But they are way less visible, having removed the dirt that was filling the low spots, and the greasiness on top of the high spots.

Mömus bmw e39 aubergine leather interior sport seats cleaning.jpg

The rest of the leather interior parts were also cleaned with the sponge, to match the now clean steering wheel. The seats were then gently cleaned, again using only lukewarm water, and soft bristle brush. This way the cleaning was not to abrasive on the top coat of the leather, since the last time these seats received any care or protection was unknown to me.

Mömus bmw e39 aubergine leather interior sport seats Before

Here the front of the seat has already been cleaned, and reveals a more matte surface. Even the color pops more.  After all the of leather surfaces were cleaned, a natural care product was applied.  

Mömus bmw e39 aubergine leather interior sport seats After

Now in my opinion, vacuuming the carpet and the over mats is one of the biggest transformation to the cars interior. Especially with Harvey, our cocker spaniel, leaving white hairs all over the place. 

Mömus bmw e39 aubergine leather interior sport seats Carpet After

We made a little video introducing the interior and thoroughly cleaning it:

We are currently working on refinishing a whole lot of trim, and taking headliner and pillars out.

Mömus bmw e39 aubergine leather interior sport seats next time