Decided to share my story of my TDI quattro that I have been improving over the last 6 years already. Bought it as my first car. Since I have had to do a lot of driving these years(altogether over 100k km in 6 years) I had to get something economical but it had to be a quattro. C4 S6 would have been nicer but not a student car so much. So that's what I started out with:
The exterior of the car was totally stock A6 C4, technically it had quite a few flaws and problems that I started to figure out, although the engine has been running strong and the body is good also, not much rust.
The interior was not very nice, steering wheel leather worn and also the driver's seat.
Over the years I always thought I am not gonna spend a fortune on a car project - but for now I have spent quite a lot of time and money retrofitting all the goodies to this car.
The car previously had -
1AH = electronic differential lock (EDL)
1BE = sports suspension/shock absorption
1G3 = alloy spare wheel with original equipment tires
2PV = leather trimmed sports steering wheel
3AF = outer right rear view mirror: convex, powered, heated
3BS = outer left rear view mirror: non-spherical, powered, heated
3FQ = electric sliding/pop-up sun roof with automatic pre-selection
4UE = airbag f. driver a. front seat passenger
8AE = radio "delta"
8RQ = speakers (active) with BOSE sound
C1L = cast alloy wheels 7J x 16 five-arm style, offset 45
M49 = 5-cyl. turbo diesel engine 2.5 L/103 kW with MVEG 2 base engine is T4E
Q1D = sports front seats
So it did not have very good equipment, it even did not have the automatic AC but I wanted it and some other features.
And for now I have made my own equipment list what I have added to the car.
And now some pictures of retrofitting and etc.
They are somewhat organized and some of them have some description also.
New steering wheel leather
Rear diff seals replacement
Cruise control retrofit
S6 rear light
4.2 V8 clutch pressure plate with 2.5 TDI AAT clutch disk
Blue soft cloth interior that I had in the car for some time
S6 Plus rear hatch spoiler
Instruments workshop
S6 Plus blue instruments
S6 Plus with glow plugs
New S6 Plus gear knob
Original electric seat supports welded
Coated to protect from corrosion
Seat supports painted
Drivers seat fitted
S6 Plus door cards with carbon trim and black door levers
Hella xenon ballasts just for more OEM
Ballast fitted
Xenon lights fitted and working
New flipkey
Adding 2 pins to central locking pump wiring
Bench testing my climate control system
Retrofitting the piping
6.6L windscreen washer fluid reservoir with two pumps instead of 4.4L
Can I put it back together??
It works!
Seat heater bulbs look dead in the picture, IRL they are good.
OBD II plug in center console like US late C4-s(despite the cover)
I cover it with the original piece of carpeting when not in use.
Some new tires(Nokian Line 225/45/17 91V) for the Plus wheels
Under the car
Gearbox oil change
FEBI oil that is applicapable to GL-4 gearboxes - I do not recommend, crunchy gear changes guaranteed changed it to OE in few thousand kilometers.
That's more like it.
Black anodized trims
Old brakes and struts
HP2 brakes getting sandblasted and powdercoated
I don't like aftermarket ABS sensors so I cut a rusted A6 struts to get some original sensors
Some new parts
S6 struts sandblasted and powdercoated, old A6 one on the right.
Rear brake splash guards S6
Doing a custom wiring for memory mirrors to integrate folding function to the wiring. There are some cars with memory and folding mirrors but I have not seen in person.
Labelling the wires and soldering
Mirror folding relay
Retrofitted the Servotronic steering rack with S6 steering damper
Here is the Servotronic relay and also the "Komfortblinker" relay can be seen here.
A quick "zahnriemenwechsel".
It has been a driving project also, not always standing in the garage.
Getting ready her for a paint job.
The quattro glass I will fit to the S6 Plus rear hatch.
Old headlining coming off
Overhauled drivers door hinge
After painting
Difference between door seals seen below - S6 Plus on the left and standard on the right.
Gluing the new headlining, old armrest works great.
That's a bad picture. Too many pictures to notice this I hope.
All parts fitted to the headlining. I like dark headlining.
Glass sunroof and a new windshield.
That looks reasonable thing to do.
That's C5 TDI Facelift tips.
That's how she looks at the moment. Sorry for the super long post.
Hope you guys find it interesting or worth looking because it is still a TDI.
The exterior of the car was totally stock A6 C4, technically it had quite a few flaws and problems that I started to figure out, although the engine has been running strong and the body is good also, not much rust.
The interior was not very nice, steering wheel leather worn and also the driver's seat.
Over the years I always thought I am not gonna spend a fortune on a car project - but for now I have spent quite a lot of time and money retrofitting all the goodies to this car.
The car previously had -
1AH = electronic differential lock (EDL)
1BE = sports suspension/shock absorption
1G3 = alloy spare wheel with original equipment tires
2PV = leather trimmed sports steering wheel
3AF = outer right rear view mirror: convex, powered, heated
3BS = outer left rear view mirror: non-spherical, powered, heated
3FQ = electric sliding/pop-up sun roof with automatic pre-selection
4UE = airbag f. driver a. front seat passenger
8AE = radio "delta"
8RQ = speakers (active) with BOSE sound
C1L = cast alloy wheels 7J x 16 five-arm style, offset 45
M49 = 5-cyl. turbo diesel engine 2.5 L/103 kW with MVEG 2 base engine is T4E
Q1D = sports front seats
So it did not have very good equipment, it even did not have the automatic AC but I wanted it and some other features.
And for now I have made my own equipment list what I have added to the car.
- OEM automatic climate control with all original wiring and piping
- 4x electric windows(with OEM wiring so the windows will be operated by central locking also)
- Front fog light retrofit
- Headlight washers with custom wiring(original relay) but controlled by a button on the wiper stalk(custom wiper stalk from A4 B5 Avant matched with C4 Avant one)
- OEM flip key with Aerial central locking pump that communicates 433.92 MHz
- OEM xenon lights with good Hella ballasts not some random aftermarket ones
- S6 Plus electric sports leather seats with memory for drivers seat and for the mirrors
- A8 D2 facelift big mirrors with memory function and auto dipping passenger side mirror and also folding
- Chiptuning for extra power and to kill the dual mass flywheel
- Single mass flywheel with 4.2 V8 pressure plate and 2.5 TDI AAT clutch disk
- S6 Plus rear hatch with the 3rd brake light spoiler
- S6 rear hatch light
- S6 Plus blue instruments(with TDI spiral light for glow plugs)
- S6 Plus shining black roof rails
- S6 Plus 17x8 wheels
- S6 Plus steering wheel
- S6 Plus gear knob(brand new)
- S6 brakes and struts with complete rehaul
- S6 front bumper with fenders
- S6 rear brakes with complete rehaul
- S6 steering damper
- Servotronic wiring and steering rack
- Complete respray
- urS4 "quattro" inscription rear glass
- S6 strutbar
- Glass sunroof instead of steel one
- Dark headlining with all original S6 Plus plastic parts(not painted)
- OBD II plug in center console like US sold C4-s
- C5 facelift chrome exhaust tips
And now some pictures of retrofitting and etc.
They are somewhat organized and some of them have some description also.
New steering wheel leather
Rear diff seals replacement
Cruise control retrofit
S6 rear light
4.2 V8 clutch pressure plate with 2.5 TDI AAT clutch disk
Blue soft cloth interior that I had in the car for some time
S6 Plus rear hatch spoiler
Instruments workshop
S6 Plus blue instruments
S6 Plus with glow plugs
New S6 Plus gear knob
Original electric seat supports welded
Coated to protect from corrosion
Seat supports painted
Drivers seat fitted
S6 Plus door cards with carbon trim and black door levers
Hella xenon ballasts just for more OEM
Ballast fitted
Xenon lights fitted and working
New flipkey
Adding 2 pins to central locking pump wiring
Bench testing my climate control system
Retrofitting the piping
6.6L windscreen washer fluid reservoir with two pumps instead of 4.4L
Can I put it back together??
It works!
Seat heater bulbs look dead in the picture, IRL they are good.
OBD II plug in center console like US late C4-s(despite the cover)
I cover it with the original piece of carpeting when not in use.
Some new tires(Nokian Line 225/45/17 91V) for the Plus wheels
Under the car
Gearbox oil change
FEBI oil that is applicapable to GL-4 gearboxes - I do not recommend, crunchy gear changes guaranteed changed it to OE in few thousand kilometers.
That's more like it.
Black anodized trims
Old brakes and struts
HP2 brakes getting sandblasted and powdercoated
I don't like aftermarket ABS sensors so I cut a rusted A6 struts to get some original sensors
Some new parts
S6 struts sandblasted and powdercoated, old A6 one on the right.
Rear brake splash guards S6
Doing a custom wiring for memory mirrors to integrate folding function to the wiring. There are some cars with memory and folding mirrors but I have not seen in person.
Labelling the wires and soldering
Mirror folding relay
Retrofitted the Servotronic steering rack with S6 steering damper
Here is the Servotronic relay and also the "Komfortblinker" relay can be seen here.
A quick "zahnriemenwechsel".
It has been a driving project also, not always standing in the garage.
Getting ready her for a paint job.
The quattro glass I will fit to the S6 Plus rear hatch.
Old headlining coming off
Overhauled drivers door hinge
After painting
Difference between door seals seen below - S6 Plus on the left and standard on the right.
Gluing the new headlining, old armrest works great.
That's a bad picture. Too many pictures to notice this I hope.
All parts fitted to the headlining. I like dark headlining.
Glass sunroof and a new windshield.
That looks reasonable thing to do.
That's C5 TDI Facelift tips.
That's how she looks at the moment. Sorry for the super long post.
Hope you guys find it interesting or worth looking because it is still a TDI.
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