Check the Engine Oil Level (No Dipstick)

The Alpina B5 / D5 (G30/G31, 2017–2024) has no engine oil dipstick. Like the 5-series it is built on, it uses an electronic oil-level system that you read from the iDrive display rather than by pulling a stick from the block. That catches a lot of owners out the first time they open the bonnet looking for a dipstick that was never fitted — but checking the level is quick and accurate once you know where the reading lives. This guide covers how to set the car up correctly first, how to call up the oil-level check on screen, and how to top up without overfilling on these specification-sensitive engines.

How the Electronic Oil Check Works

Instead of a dipstick, a sensor in the sump measures the oil level and the car reports it to you as a gauge or a “within range” result on the display. Because the reading is taken by a sensor sitting in the oil, the result is only meaningful when the oil has drained back and settled and the engine is at the temperature the system expects — the electronics compensate for temperature, but only within the conditions it is designed for. That is why the car wants a level surface and a warm, settled engine before it will give you a trustworthy figure. Get those conditions right and the electronic check is at least as reliable as a dipstick; get them wrong and it can read falsely high or low.

First, a Few Checks

• Park the car on level ground — a slope tips the oil in the sump and skews the sensor reading.
• Bring the engine up to normal operating temperature, then switch it off.
• After switching off, allow a short settling time so the oil can drain back down before you read the level.
• Have the ignition on so the iDrive display and its menus are available.
• If you plan to top up, have the correct-specification oil to hand before you start — check the grade in your handbook.

Checking the Oil Level

1. With the ignition on, use the iDrive controller.
2. Go to ‘My Vehicle’ > ‘Vehicle status’ (or Vehicle Information) and select the engine oil level check.
3. The system measures and shows the level on the display.

Topping Up

• Add the correct specification oil a little at a time — don’t overfill.
• Re-run the check after a few minutes to give the oil time to settle.
• Use the grade in your handbook — the Alpina-tuned engines are specification-sensitive.

If the Reading Looks Wrong

• Double-check the car is genuinely level — even a mild camber can move the result up or down.
• Make sure you gave the oil enough settling time after shutdown; reading too soon is the most common cause of a false low.
• Confirm the engine was actually warmed to operating temperature — a cold-engine reading can mislead.
• If the display says the measurement isn’t available yet, the system may still be gathering data — drive normally and try again later.
• A reading that stays implausible after a correct check, or a persistent oil warning, points to a sensor or level issue worth having inspected.

What to Expect After a Top-Up

Because the sensor needs time to see the added oil, the display won’t jump the instant you pour it in. Add a small amount, wait a few minutes, and re-run the check before deciding whether more is needed. Creeping up gradually like this is the safest way to land in range, since these engines don’t react well to overfilling and there is no dipstick to wipe and re-read as a quick sanity check.

Frequently Asked Questions

Does the Alpina B5 / D5 have a dipstick?

No. There is no engine oil dipstick on the G30/G31 B5 or D5 — you check the level electronically from the iDrive display under My Vehicle > Vehicle status. If you open the bonnet looking for a dipstick you won’t find one; the sensor in the sump does the job instead.

Should the engine be warm when I check?

Yes. Bring the engine to normal operating temperature, switch off, and allow a brief settling period on level ground before reading the level. A cold engine, a slope, or reading too soon after shutdown are the three things most likely to give you a misleading figure.

Do I need any tools or a garage?

No. The oil-level check is built into the car and read through iDrive, so you don’t need a dipstick, a diagnostic tool, or a workshop visit for a routine check. The only thing you might need is the correct-grade oil if the reading comes back low and you want to top up.

What oil should I use to top up?

Use the grade and specification listed in your handbook. The Alpina-tuned engines are sensitive to oil specification, so it is worth matching exactly what is called for rather than pouring in whatever is on the shelf. Add it a little at a time and re-check rather than filling in one go.

What if the check reads low?

Top up gradually with the correct-specification oil, waiting a few minutes and re-running the electronic check between additions so the sensor can register what you’ve added. Aim to bring it into range without overfilling — too much oil is as harmful as too little on these engines.

Why won’t the display show a level yet?

The system sometimes reports that a measurement isn’t available, usually because it hasn’t gathered enough data since start-up or the oil hasn’t settled. Drive the car normally, then repeat the check with the engine warm and the car parked level, and the reading should appear.

If an oil-level or oil-pressure warning appears, you can decode the fault code on autodtcs.com.