2005 Audi RS6 C5 Avant - Manual Conversion

*** Interested parties should note, this vehicle was subject to a CAT N insurance loss in 2022 ***

Highlights

• Professional conversion to 6spd manual gearbox in 2024
• Very high specification including 526bhp MRC tuning pack
• £5,000 invested via specialists since early 2025
• Very well maintained with recent specialist service in August 2025
• Recent BC BR coilover conversion, gearbox service and other work
• Rear pads and calipers replaced April 2026
• Smartly presented in Avus Silver with black leather
• MOT valid until April 2027 with no advisories

The Appeal

Audi’s RS2 led the way, but it was the 4.2L 450bhp twin turbo C5 RS6 that essentially invented the idea of the super estate, a big load lugger with the pace of a Lamborghini, Ferrari or Porsche. This rather special 2005 car takes what the factory started and takes it considerably further with a host of deep-dive improvements.

The headline changes are that professionally fitted 6spd manual, which replaces the rather sluggish 5spd DSG unit fitted to all factory cars. Then there’s the MRC tuning pack, which takes power to 526bhp. Elsewhere, the suspension, brakes and intercoolers have all been attended to. What perhaps makes the car especially appealing is that, aside from some grey anodised alloys and dechroming, it looks exactly like a standard RS6 Avant.

The vendor acquired the car in 2024 and has subsequently spent £5,000 via specialists to maintain and improve it. The cambelt was replaced during the 2024 gearbox conversion at 126,000 miles. Other work has included fitting BC BR coilovers, a gearbox service, engine gaskets and other work, a brake fluid change, and a full service. In April 2026, the rear pads and callipers were replaced. A reputable specialist completed all work, as shown in the invoice photos. The car carries an MOT to April 2027 with no advisories. The vendor’s work builds on an already impressive maintenance history, shown in photos and summarised below.

This is a much-improved and well-kept example of a genuine modern classic.

The vendor says:

“The car drives exactly as an RS6 should—immense performance, huge torque and a manual gearbox that transforms the driving experience while retaining all the practicality of the Avant. This car gets so much attention- the noise, the performance. It's an incredible package. Provides endless smiles…”

Key Information

• Mileage: 144,826 miles indicated (supported by MOT and service history records)
• Country of registration: United Kingdom
• Technical inspection status: MOT valid until 22nd April 2027 with no advisories
• Technical specs: 526bhp 4,200cc twin-turbocharged V8, six-speed manual (converted)
• Paperwork: Service book, dyno print out, V5C, various invoices

Maintenance history:

04/26 - £898 - P6 Performance:

• Rear pads
• Rear calipers

08/25 – £1,280 - 137,111 miles - P6 Performance:

• Oil change
• Inspection
• Spark Plugs
• Brake Fluid
• Fuel Filter
• Cabin Filter

01/25 - £2,395 - P6 Performance:

• BC BR coilover conversion
• Gearbox service
• Drivers side rocker cover gasket
• Rear cap seal
• Offside front steering knuckle assembly
• Offside wheel bearing

09/24 - 128584 miles:

• MRC tuning package 526bhp / 780Nm

08/24 – 127,131 miles - C I Services:

• Oil change
• Inspection
• Rear Diff Oil

04//20 – 118,852 miles - Independent specialist:

• Oil change
• Inspection
• No book stamp

06/13 – 105,496 miles - Bristol Audi:

• Long Life Service

04/12 – 96,648 miles - Southampton Audi:

• Oil change
• Inspection
• Cambelt
• Water pump

06/10 – 86,725 miles - Parklands Audi:

• Oil change
• Inspection
• NSF CV Boot
• Rack Gaiter
• NSR Wheel Bearing
• Rear Antiroll bar bushes
• 4x Tyre pressure sensors

10/09 – 76,778 miles - Parklands Audi:

• Long Life Service

02/09 – 66,472 miles - Parklands Audi:

• Oil change
• Inspection
• RH CV joint
• Front Shock Absorbers
• Front brake pads

05/08 – 56,356 miles - Northfield Audi:

• Oil change
• Inspection
• Rear shock absorbers and accumulators
• Satnav replaced

Also replaced:

• Gearbox
• Radiator
• Oil coolers
• Alternator

11/07 – 46,176 miles - Northfield Audi:

• Oil change
• Inspection
• Tyres

04/07 – 36,375 miles - Northfield Audi:

• Oil change
• Inspection
• Discs & Pads
• Cambelt
• Water pump

05/06 – 26,396 miles - Aston Green Audi:

• Oil change

12/05 – 17,909 miles - Crewe Audi:

• Oil change
• Inspection

05/05 – 9,124 miles - Crewe Audi:

• Oil change
• Inspection

Manual gearbox conversion at 126,000 miles (c.2024):

• 01E 6-speed gearbox with modified bellhousing
• Single-mass flywheel
• Sachs performance clutch

Also upgraded were

• Hybrid Turbos
• Reworked Airtec intercoolers
• Forge can induction system.

The Detail

• Well kept Avus Silver Pearl metallic paintwork in good order
• Exterior largely standard with dechrome and black grille
• Some light stone chips and other marks typical of age and mileage
• Bodywork presents well including arches and underside
• Rear quarters professionally resprayed for cosmetic reasons
• PPF applied to the rear wheel arches
• Under trays are missing
• Parking sensors are not currently functioning
• Factory five spoke 19in alloys painted dark grey and in good order
• Some light marks and edge scuffs to note to alloys
• Fitted with quality Michelin tyres
• Supplied with factory tyre sealant kit and tools
• Black leather Recaro interior with grey piping and carbon trim
• Interior in good order with some light wear to switches typical of model
• Well maintained car with long list of maintenance and improvements above
• Interior features alcantara headlining, black leather seats and front and rear heated seats
• Factory satnav/radio/TV and 6-disc CD changer fitted
• Radio/satnav/TV unit is not currently functioning
• Remote central locking via keyfob is not currently functioning
• No advisories on MOT

BEFORE YOU BUY

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