U0155 on Mercedes-Benz
Lost Communication with Instrument Cluster
U0155 on Mercedes-Benz vehicles indicates lost communication with instrument cluster. Au7o has documented this code across 2 Mercedes-Benz models — most commonly on EQS SUV, GLB. This is a network communication code meaning a control module (usually the engine or body computer) has lost communication with the instrument cluster over the vehicle's data bus. Modern vehicles share information between modules over a network (such as CAN), and the cluster both displays data and relays messages. When messages from the cluster stop arriving, this code sets. You may see warning lights, dead or erratic gauges, missing displays, or other modules acting up. It usually points to wiring, power/ground, or the cluster itself rather than the engine.
Common Causes of U0155
- •Faulty instrument cluster
- •Loss of power or ground to the cluster
- •Damaged or corroded CAN bus wiring
- •Loose or corroded connectors at the cluster
- •Blown fuse feeding the cluster
- •Short or open on the communication bus
- •A different failed module dragging down the bus
U0155 on Mercedes-Benz by Model
Mercedes-Benz EQS SUV(1 issue)
- Main Fuse Box 80-Amp Fuse Failure Causing Sudden Loss of Drive Power2023-2024
The main fuse box in the X296 EQS SUV (shared across the EVA2 EQE/EQS family) was built with improperly manufactured 80-amp fuses. The fuse element can fail prematurely under normal load, cutting the low-voltage supply that the drive, restraint, and cluster systems depend on. Mercedes-Benz recalled the vehicles under NHTSA campaign 24V-115; a fire risk could not be ruled out. A follow-up campaign (25V-255) was opened after dealers installed the wrong fuse box on some vehicles during the first repair, re-creating the same failure mode.
Mercedes-Benz GLB(1 issue)
- Water Intrusion Into Front Footwells Causing Blank Instrument Cluster or Engine Stall (Recall 20V246)2020
Recall 20V246 directly covers 26 model-year 2020 GLB 250 vehicles whose body seam in the wheel-well area may allow water into the front footwells. Water can damage control units, causing the instrument cluster display to fail, an engine no-start or an engine stall. The 26-vehicle population is not an owner-report count, and the recall does not establish that every water leak shares this path.
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View U0155 across all makes →Frequently Asked Questions
What does U0155 mean on Mercedes-Benz?▼
U0155 stands for "Lost Communication with Instrument Cluster." This is a network communication code meaning a control module (usually the engine or body computer) has lost communication with the instrument cluster over the vehicle's data bus. Modern vehicles share information between modules over a network (such as CAN), and the cluster both displays data and relays messages. When messages from the cluster stop arriving, this code sets. You may see warning lights, dead or erratic gauges, missing displays, or other modules acting up. It usually points to wiring, power/ground, or the cluster itself rather than the engine. On Mercedes-Benz specifically, this code is documented across 2 models.
What causes U0155 on Mercedes-Benz vehicles?▼
Common causes on Mercedes-Benz: Faulty instrument cluster, Loss of power or ground to the cluster, Damaged or corroded CAN bus wiring, Loose or corroded connectors at the cluster, Blown fuse feeding the cluster. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U0155 on a Mercedes-Benz?▼
Repair costs vary widely depending on the root cause and specific Mercedes-Benz model.
Which Mercedes-Benz models have U0155 documented?▼
Au7o has documented U0155 on 2 Mercedes-Benz models: EQS SUV, GLB.