Mercedes-Benz ML 270 CDI annual maintenance (for less than 150 euros?)

2005 Mercedes-Benz ML 270 CDI (W163)
July 2023
315074 km (195 777 miles)
00:00 Preparations, removal of splash guards, checking some oil leaks
01:23 Engine oil and filter change
03:28 Starting, checking for any new oil leaks...
03:54 Putting splash guards back in place
04:38 Fuel filter replacement
05:42 Changing the engine air filter
08:24 Start-up, checking for fuel leaks
09:04 Cabin air filter (pollen filter) replacement
Tools and accessories:
- Oil 7.5 liters (Castrol Magnatec 5W-40 C3) = 65€
- Oil filter (Bosch P7001 / 1 457 437 001) = 8€
- Oil plug seal (14/20mm) = 1€
- Plastic fasteners (Restagraf 10735 / Motonet 47-1798) = 9.5€ (10 pcs)
- Fuel filter (Bosch N4416 / 1 457 434 416) = 21€
- Air filter (Hengst E397L01) = 11€
- Cabin air filter (Hengst E1912LC) = 18€
The total price of the project: ~ €134
Required tools:
- Oil plug = 13 mm wrench
- Oil filter tool 74mm / 14-angled (e.g. Bahco BE6307614F / Motonet 80-3269 = 8€)
- O-ring release hook
- For the fuel filter: 5mm allen/hex (e.g. a bit and a small ratchet)
- For the air filter housing E-Torx (I didn't have a suitable one, a 12-cornered 8mm socket works also...)
- For changing the cabin air filter, torx T20 + 5.5 mm socket