This is the last set of original Renault cruise control buttons. Sold about 40+ sets already. 

A better complete package plug & drive with the panel is now available via https://www.ebay.co.uk/itm/376535788342

A complete package plug & drive without the panel is now available via https://www.ebay.co.uk/itm/376543260622

Selling as one set: three switches. Also selling separate switches and the frame. Please check the other listings or PM.

All three switches have this common markings: 26488 (04) <R> >015> <POM>

BLUE switch
Cruise Control / Speed Limiter (a three positions switch, two choices are sticking)
421910 or 411138 (the difference is in the bottom icon displayed, I like the latter more)
Original part: Renault Group [X1 Made in France]
82 00 421 910 // 8200421910 or 82 00 411 138 // 8200411138
wires:
A1 black // negative 12V-
A2 yellow // ^^ has 12V+ when the ignition is on
A3 brown // ^ connects to A2 when the upper switch is on (cruise control)
B1 white // ^ connects to A2 when the bottom switch is on (speed limiter)
B2 thicker yellow&black and yellow wires (two of them)
B3 empty
positions:
when [upper] is pressed: the resistance between A2 and A3 becomes ~0 Ohm // cruise control on
when [lower] is pressed: the resistance between A2 and B1 becomes ~0 Ohm // speed limiter on
else [middle position] all the contacts are disconnected
has a fitting/stopper next to B1 preventing it from being plugged into other colour sockets

BLACK or GREY switches
+/- (three positions, + & - do not stick)
525404 black; 411139 (grey)
Original part: Renault Group [X1 Made in France]
82 00 525 404 // 8200525404 or 82 00 411 139 // 8200411139
wires:
A1 black/grey
A2 pale pink purplish brown
A3 empty
B1 green
B2 yellow
A3 empty
positions:
when + is pressed: the resistance between A2 and B1 becomes ~300 Ohm
when - is pressed: the resistance between A2 and B1 becomes ~100 Ohm
else all the contacts are disconnected
N.B. black is pretty the same as a grey switch, but the grey has extra small internal fitting/stopper pin preventing it from sliding into the black plug
grey has a fitting/stopper next to B1 preventing it from being plugged into other colour sockets

Important: choose what + - switch you prefer: black or grey. Ask for the details via PM. N.B. if one of the colours is out of stock, another colour will be sent and the fitting pin removed for the button to go into both black and grey sockets.

RED switch
R O Button (three positions, R & O do not stick) [ IMPORTANT // N.B. not to confuse with the air suspension button, which is also red and also has a similar red coloured socket, with different fitting and wiring though ]
441141
Original part: Renault Group [X1 Made in France]
82 00 441 141 // 8200441141
wires:
A1 black
A2 green
A3 empty
B1 two pinky purple brown
B2 yellow
B3 empty
positions:
when O pressed the resistance between A2 and B1 becomes 0 Ohm
when R pressed the resistance between A2 and B1 becomes ~900 Ohm
has a fitting/stopper next to A3 preventing it from being plugged into other colour sockets

N.B. if your van does not have a red connection for the R O button, note that R O also connects to the same wires as + / - (black or grey sockets of the standard cruise control in Master  / Movano). It is advised to get the extra plug / socket with wires to connect it. Please check item number 376013752639 or ask via PM.

Also compatible with:
* Renault Clio
* Renault Espace
* Renault Laguna
* Renault Master
* Renault Mascott
* Renault Mégane
* Renault Trafic
* Opel Movano
* Opel Vivaro
* Nissan Interstar
* Nissan Primastar
* Iveco Daily

AI summary:

Elevate your Renault Master MK2's functionality with these versatile cruise control buttons / switches, designed to control multifunctional settings, boot release, and boost control. The set includes precisely engineered push switches, finished in an elegant black colour, ensuring a seamless integration with your vehicle's dashboard and centre console. Suitable for models from 1998 to 2010, these switches are a perfect match for those seeking to replace or upgrade their existing system. Crafted in France, these buttons boast a 'as new' grade and come with a reassuring 10-year manufacturer warranty, in addition to a 3-month seller warranty. Their robust build ensures durability, dustproof and weatherproof features, making them a reliable choice for any Renault Master owner. The part numbers, including 8200421910, 8200411138, 8200525404, 8200411139, and 8200441141, along with the MPN 82 00 421 910 / 82 00 411 138 / 82 00 525 404 / 82 00 411 139 / 82 00 441 141, confirm their authenticity and fitment for universal application.